Intelligent man (CC and other books)

Expressions researched:
"intelligent man" |"intelligent men"

CC Preface and Introduction

The intelligent man situated in Kṛṣṇa consciousness does not try to forcibly stop his senses from acting. Rather, he engages his senses in the service of Kṛṣṇa.

CC Preface:

The intelligent man situated in Kṛṣṇa consciousness does not try to forcibly stop his senses from acting. Rather, he engages his senses in the service of Kṛṣṇa. No one can stop a child from playing by leaving him inactive; rather, the child can be stopped from engaging in nonsense by being engaged in superior activities. Similarly, the forceful restraint of sense activities by the eight principles of yoga is recommended for inferior men; superior men, being engaged in the superior activities of Kṛṣṇa consciousness, naturally retire from the inferior activities of material existence.

CC Adi-lila

That golden Lord Kṛṣṇa is Lord Caitanya, who is worshiped by intelligent men in this age.

CC Adi 3.52, Translation and Purport:

"In the Age of Kali, intelligent persons perform congregational chanting to worship the incarnation of Godhead who constantly sings the name of Kṛṣṇa. Although His complexion is not blackish, He is Kṛṣṇa Himself. He is accompanied by His associates, servants, weapons and confidential companions."

This text is from Śrīmad-Bhāgavatam (11.5.32). Śrīla Jīva Gosvāmī has explained this verse in his commentary on the Bhāgavatam, known as the Krama-sandarbha, wherein he says that Lord Kṛṣṇa also appears with a golden complexion. That golden Lord Kṛṣṇa is Lord Caitanya, who is worshiped by intelligent men in this age. That is confirmed in Śrīmad-Bhāgavatam by Garga Muni, who said that although the child Kṛṣṇa was blackish, He also appears in three other colors—red, white and yellow. He exhibited His white and red complexions in the Satya and Tretā ages respectively. He did not exhibit the remaining color, yellow-gold, until He appeared as Lord Caitanya, who is known as Gaura Hari.

CC Adi 9.43, Translation:

"'By his work, thoughts and words, an intelligent man must perform actions which will be beneficial for all living entities in this life and the next.'"

The Kṛṣṇa consciousness movement is the only hope to direct the attention of intelligent men to a greater benefit in life.

CC Adi 9.43, Purport:

After giving up the body, one who knows Kṛṣṇa in truth does not come back again to this world to accept a material body, but he goes back home, back to Godhead. This knowledge is in the śāstras, and people should be given the opportunity to understand it. Even if one is not able to go back to Godhead in one life, the Vedic civilization at least gives one the opportunity to be promoted to the higher planetary systems, where the demigods live, and not glide down again to animal life. At present, people do not understand this knowledge, although it constitutes a great science, for they are uneducated and trained not to accept it. This is the horrible condition of modern human society. As such, the Kṛṣṇa consciousness movement is the only hope to direct the attention of intelligent men to a greater benefit in life.

Formerly, before the beginning of Kali-yuga, almost everyone, especially among the intelligent men, the brāhmaṇas, was a śruti-dhara.

CC Adi 16.44, Purport:

In this connection, śruti-dhara is a very important word. Śruti means "hearing," and dhara means "one who can capture." Formerly, before the beginning of Kali-yuga, almost everyone, especially among the intelligent men, the brāhmaṇas, was a śruti-dhara. As soon as a student heard any of the Vedic wisdom from his master, he would remember it forever. There was no need to refer to books, and therefore there were no written books in those days. The spiritual master delivered the Vedic hymns and their explanations to the student, who would then remember them forever, without consulting books.

CC Madhya-lila

The conversation of these two prabhus-Nityānanda Prabhu and Advaita Prabhu-carried a deep meaning that only an intelligent man can understand.

CC Madhya 12 Summary:

There was also some humorous talk between Nityānanda Prabhu and Advaita Prabhu during prasādam. Advaita Prabhu said that Nityānanda Prabhu was unknown to anyone and that it was not the duty of a householder brāhmaṇa to accept dinner with a person unknown in society. In answer to this humorous statement, Śrī Nityānanda Prabhu replied that Advaita Ācārya was a monist and that one could not know how his mind could be turned by eating with such an impersonalist. The conversation of these two prabhus-Nityānanda Prabhu and Advaita Prabhu-carried a deep meaning that only an intelligent man can understand.

We are always in a distressed condition, and an intelligent man naturally becomes inquisitive.

CC Madhya 20.127, Purport:

Sometimes we go to an astrologer or palmist when we are in a distressed condition or when we want to know the future. The living entity in conditioned life is always distressed by the threefold miseries of material existence. Under the circumstances, he is inquisitive about his position. For instance, Sanātana Gosvāmī approached the Supreme Personality of Godhead, Śrī Caitanya Mahāprabhu, to ask Him why he was in a distressed condition. This is the position of all conditioned souls. We are always in a distressed condition, and an intelligent man naturally becomes inquisitive. This position is called brahma-jijñāsā. Athāto brahma jijñāsā (Vedānta-sūtra 1.1.1). Brahma here refers to the Vedic literature. One should consult the Vedic literature to know why the conditioned soul is always in a distressed condition. The Vedic literatures are meant to free the conditioned soul from the miserable conditions of material existence. In this chapter, the story of the astrologer Sarvajña and the poor man is very instructive.

It is not a question of being Christian, Muslim or Hindu. One should be purely religious and freed from all these material designations. In this way one can learn the art of devotional service. This argument appeals to all intelligent men, and consequently the Kṛṣṇa consciousness movement is gaining ground throughout the world.

CC Madhya 25.20, Purport:

Following in the footsteps of Śrī Caitanya Mahāprabhu, we are trying to convince everyone that the devotional service of the Lord is enjoined in every scripture. If a person is religious, he must accept the supreme authority of the Lord, become His devotee and try to love Him. This is the real principle of religion. It does not matter whether one is Christian, Muslim or whatever. He simply must accept the sublime position of the Supreme Personality of Godhead and render service unto Him. It is not a question of being Christian, Muslim or Hindu. One should be purely religious and freed from all these material designations. In this way one can learn the art of devotional service. This argument appeals to all intelligent men, and consequently the Kṛṣṇa consciousness movement is gaining ground throughout the world. Due to our solid logic and scientific presentation, Śrī Caitanya Mahāprabhu's prediction that Kṛṣṇa consciousness will spread to every town and village throughout the world is gradually being realized.

Teachings of Lord Caitanya

The intelligent man who is situated in Kṛṣṇa consciousness does not try to forcibly stop his senses from acting. Rather, he engages his senses in the service of Kṛṣṇa.

Teachings of Lord Caitanya, Chapter Preface:

The regulative principles and the rules of yoga, the various sitting postures and breathing exercises performed in an attempt to withdraw one's senses from the sense objects are methods meant for those who are too much engrossed in the bodily conception of life. The intelligent man who is situated in Kṛṣṇa consciousness does not try to forcibly stop his senses from acting. Rather, he engages his senses in the service of Kṛṣṇa. No one can stop a child from playing by leaving him inactive. A child can be stopped from engaging in nonsense by being engaged in superior activities. The forceful restraint of sense activities by the eight principles of yoga is recommended for inferior men. Being engaged in the superior activities of Kṛṣṇa consciousness, superior men naturally retire from the inferior activities of material existence.

An intelligent man will not accept anyone as an avatāra without studying the principal and marginal features.

Teachings of Lord Caitanya, Chapter 8:

One should be able to understand and distinguish the principal and marginal features of an avatāra. No one can declare himself an incarnation without referring to these two features. An intelligent man will not accept anyone as an avatāra without studying the principal and marginal features. When Sanātana Gosvāmī tried to confirm Lord Caitanya's personal characteristics as being those of the incarnation of this age, Lord Caitanya Himself indirectly made the confirmation by simply saying, "Let us leave aside all these discussions and continue with a description of the śaktyāveśa-avatāras."

Nectar of Instruction

Instead of using his higher intelligence to cultivate God consciousness, so-called intelligent men misuse their intelligence to produce many unnecessary and unwanted things.

Nectar of Instruction 2, Purport:

By God's arrangement there is sufficient scope for the production of milk and grains for human beings all over the world, but instead of using his higher intelligence to cultivate God consciousness, so-called intelligent men misuse their intelligence to produce many unnecessary and unwanted things. Thus factories, slaughterhouses, brothels and liquor shops are opened. If people are advised not to collect too many goods, eat too much or work unnecessarily to possess artificial amenities, they think they are being advised to return to a primitive way of life. Generally people do not like to accept plain living and high thinking. That is their unfortunate position.

Every intelligent man should purify his consciousness and rid himself of the above-mentioned six hindrances to devotional service by taking wholehearted shelter of this Kṛṣṇa consciousness movement.

Nectar of Instruction 2, Purport:

This Kṛṣṇa consciousness movement offers a spiritual community that can bring about a peaceful condition in the world. Every intelligent man should purify his consciousness and rid himself of the above-mentioned six hindrances to devotional service by taking wholehearted shelter of this Kṛṣṇa consciousness movement.

Materialistic activities are not at all worthy of an intelligent man, for as a result of such activities, one gets a material body, which is full of misery.

Nectar of Instruction 10, Purport:

As stated in Śrīmad-Bhāgavatam (5.5.4):

nūnaṁ pramattaḥ kurute vikarma

yad indriya-prītaya āpṛṇoti

na sādhu manye yata ātmano 'yam

asann api kleśada āsa dehaḥ

"Materialists who work hard like dogs and hogs simply for sense gratification are actually mad. They simply perform all kinds of abominable activities simply for sense gratification. Materialistic activities are not at all worthy of an intelligent man, for as a result of such activities, one gets a material body, which is full of misery." The purpose of human life is to get out of the threefold miserable conditions, which are concomitant with material existence.

Easy Journey to Other Planets

Any intelligent man who is not disturbed by happiness and distress, understanding that they are different material phases resulting from the interactions of the inferior energy, is competent to regain the antimaterial world.

Easy Journey to Other Planets 1:

Any intelligent man who is not disturbed by happiness and distress, understanding that they are different material phases resulting from the interactions of the inferior energy, is competent to regain the antimaterial world, where life is eternal, full of permanent knowledge and bliss.

The material world is only a shadow representation of the antimaterial world, and intelligent men who are clean in heart and habit will be able to learn, in a nutshell, all the details of the antimaterial world.

Easy Journey to Other Planets 1:

The material world is only a shadow representation of the antimaterial world, and intelligent men who are clean in heart and habit will be able to learn, in a nutshell, all the details of the antimaterial world from the text of the Bhagavad-gītā, and these are in actuality more exhaustive than material details.

Less intelligent men also take shelter of demigods and only derive benefits which endure for a limited period.

Easy Journey to Other Planets 1:

There is no happiness in the material sphere—even in Brahmaloka—so plans and activities for elevation to higher planets within the material universe are carried out by those who are less intelligent. Less intelligent men also take shelter of demigods and only derive benefits which endure for a limited period. Thus their religious principles and the benefits derived therefrom are only temporary. The intelligent man, however, abandons all engagements in the name of religion and takes shelter of the Supreme Personality of Godhead and thus receives absolute protection from the Almighty Father.

A sane and intelligent man does not wish to enter any of the material planets because the four conditions of material miseries exist on all of them.

Easy Journey to Other Planets 2:

A sane and intelligent man does not wish to enter any of the material planets because the four conditions of material miseries exist on all of them. From Bhagavad-gītā we can understand that even if we enter Brahmaloka, the highest planetary system of this universe, the four principles of misery will be present.

Krsna, The Supreme Personality of Godhead

Any intelligent man can understand that the laws of God cannot be violated.

Krsna Book 2:

Kaṁsa knew very well that no one can frustrate the purpose of Viṣṇu. Any intelligent man can understand that the laws of God cannot be violated. His purpose will be served in spite of all impediments offered by the demons. Kaṁsa thought, “If I kill Devakī at the present moment, Viṣṇu will enforce His supreme will more vehemently. To kill Devakī just now would be a most abominable act.

An intelligent man does not try to understand the Absolute Truth by speculative or mystic power.

Krsna Book 14:

The best course is to surrender unto the Supreme Personality of Godhead with body, mind and words and always be engaged in His service. This transcendental labor is fruitful, but other attempts to understand the Absolute Truth are never successful. Therefore an intelligent man does not try to understand the Absolute Truth by speculative or mystic power. Rather, he engages in devotional service and depends on the Supreme Personality of Godhead.

Any intelligent man who cares for his own self-interest reposes all his loving spirit in You.

Krsna Book 29:

Then the gopīs told lotus-eyed Kṛṣṇa, “Please do not discourage our long-cherished desires to have You as our husband. Any intelligent man who cares for his own self-interest reposes all his loving spirit in You. Persons who are simply misled by the external energy, who want to be satisfied by false concepts, try to enjoy themselves apart from You.

Less intelligent men misunderstand Your transcendental form to be made of material energy.

Krsna Book 48:

Akrūra continued: “Less intelligent men misunderstand Your transcendental form to be made of material energy. But that concept is not at all applicable to You. Actually, You are all-spiritual, and there is no difference between You and Your body. Therefore, there is no question of Your being conditioned or liberated. You are ever liberated in any condition of life.

They never made the mistake, however, of accepting the demigods as the Supreme Lord on the level of viṣṇu-tattva, as do some less intelligent men.

Krsna Book 52:

She explained that it was the custom of her family to visit the temple of goddess Durgā, their family deity, before a marriage. (The kṣatriya kings were mostly staunch Vaiṣṇavas, worshiping Lord Viṣṇu in either the Rādhā-Kṛṣṇa or Lakṣmī-Nārāyaṇa form; still, for their material welfare they used to worship goddess Durgā. They never made the mistake, however, of accepting the demigods as the Supreme Lord on the level of viṣṇu-tattva, as do some less intelligent men.) To avoid the unnecessary killing of her relatives, Rukmiṇī suggested that it would be easiest for Him to kidnap her while she was either going from the palace to the temple or else returning home.

It is clearly stated that less intelligent men worship the demigods for material benefit.

Krsna Book 53:

Lord Śiva and goddess Durgā were worshiped even by the royal families; other, minor demigods were worshiped by silly, lower-class people. As far as the brāhmaṇas and Vaiṣṇavas are concerned, they simply worship Lord Viṣṇu, the Supreme Personality of Godhead. In the Bhagavad-gītā the worship of demigods is condemned but not forbidden; there it is clearly stated that less intelligent men worship the demigods for material benefit.

Śaṅkarācārya, to convince the less intelligent men who take Kṛṣṇa to be an ordinary human being, said that God is impersona.

Krsna Book 56:

That Kṛṣṇa is the Supreme Personality of Godhead, Nārāyaṇa, as accepted by the citizens of Dvārakā, was later confirmed by the great Māyāvādī philosophical leader Śaṅkarācārya. By accepting the Lord as impersonal, he did not reject the Lord's personal form. Everything which has form in this material world is subject to creation, maintenance and annihilation, but because the Supreme Personality of Godhead, Nārāyaṇa, does not have a material form subject to these limitations, Śaṅkarācārya, to convince the less intelligent men who take Kṛṣṇa to be an ordinary human being, said that God is impersonal. This impersonality means that He is not a person of this material condition. He is a transcendental personality without a material body.

Less intelligent men do not try to understand who created the brain of the scientist.

Krsna Book 56:

Scientists utilize the physical elements or laws of material nature to do something wonderful, but actually such laws and elements are also the creation of Kṛṣṇa. This is actual scientific understanding. Less intelligent men do not try to understand who created the brain of the scientist; they are satisfied simply to see the wonderful creation or invention of the scientist.

Less intelligent men claim that there is no God.

Krsna Book 63:

“On a cloudy day, to the common man's eyes the sun appears to be covered. But the fact is that because the sunshine creates the cloud, the sun can never actually be covered, even though the whole sky may be cloudy. Similarly, less intelligent men claim that there is no God, but when the manifestation of different living entities and their activities is visible, enlightened persons see You present in every atom and through the via media of Your external and marginal energies. Your unlimitedly potent activities are experienced by the most enlightened devotees, but those who are bewildered by the spell of Your external energy identify themselves with this material world and become attached to society, friendship and love.

When the eyes of less intelligent men are covered by such influences, they think the sun to be invisible.

Krsna Book 84:

"The ordinary conditioned human being may think that the conditioned soul, who is covered by his materialistic senses, mind and intelligence, is equal to Kṛṣṇa, but Lord Kṛṣṇa is just like the sun, which, although it sometimes may appear to be so, is never covered by the cloud, snow or fog, or by other planets during an eclipse. When the eyes of less intelligent men are covered by such influences, they think the sun to be invisible. Similarly, persons who are influenced by senses addicted to material enjoyment cannot have a clear vision of the Supreme Personality of Godhead."

Less intelligent men do not understand Me, nor do they understand the influence of the brāhmaṇa Vaiṣṇava.

Krsna Book 86:

My feature of four-handed Nārāyaṇa is not so pleasing or dear to Me as is a brāhmaṇa Vaiṣṇava. Brāhmaṇa means "one well conversant with Vedic knowledge." A brāhmaṇa is the insignia of perfect knowledge, and I am the full-fledged manifestation of all gods. Less intelligent men do not understand Me, nor do they understand the influence of the brāhmaṇa Vaiṣṇava. They are influenced by the three modes of material nature and thus dare to criticize Me and My pure devotees.

It is to be understood that such instructions are meant for less intelligent men who are still attracted by material sense enjoyment.

Krsna Book 87:

Although the Vedas have recommended worship of different demigods as different parts and parcels of Kṛṣṇa, it is to be understood that such instructions are meant for less intelligent men who are still attracted by material sense enjoyment. But the person who actually wants perfect fulfillment of the mission of human life should simply worship Lord Kṛṣṇa, and that will simplify the matter and completely guarantee the success of his human life.

Their endeavors are those of less intelligent men. On the other hand, the Lord assures that His devotee has no fear of falling.

Krsna Book 87:

Although they rise to the transcendental situation of existence in impersonal Brahman, they certainly fall from that exalted position because they deride Your lotus feet.” Lord Kṛṣṇa therefore advises that the worshipers of the demigods are not very intelligent persons because they derive only temporary, exhaustible results. Their endeavors are those of less intelligent men. On the other hand, the Lord assures that His devotee has no fear of falling.

Less intelligent men take to other ways of self-realization.

Krsna Book 87:

The personified Vedas continued: “Dear Lord, less intelligent men take to other ways of self-realization, but actually there is no chance of becoming purified from material contamination or of stopping the repeated cycle of birth and death unless one is a thoroughly pure devotee.

The impersonal view of the Absolute Truth is accepted by less intelligent men.

Krsna Book 87:

But the gross materialist, without seeing the hand of God in such artistic manifestations as the actual flowers blooming in nature, concludes that the Absolute Truth is impersonal. Actually, the Absolute is personal, but He is independent. He does not require to personally take a brush and colors to paint the flowers, for His potencies act so wonderfully that it appears as if flowers have come into being without the aid of an artist. The impersonal view of the Absolute Truth is accepted by less intelligent men, because unless one is engaged in the service of the Lord one cannot understand how the Supreme is acting—one cannot even know the Lord's name. Everything about the Lord's activities and personal features is revealed to the devotee only through his loving service attitude.

The cosmic manifestation, because of the flickering nature of its impermanent existence, appears to less intelligent men to be false.

Krsna Book 87:

He personified Vedas continued: "The cosmic manifestation, because of the flickering nature of its impermanent existence, appears to less intelligent men to be false." The Māyāvādī philosophers take advantage of the flickering nature of this cosmic manifestation to try to prove their thesis that this world is false.

Less intelligent men take shelter of the demigods due to bewilderment.

Krsna Book 89:

It appears that the brāhmaṇa's house was near Kṛṣṇa's residence and that Lord Kṛṣṇa was enjoying everything that was taking place, apparently in defiance of His authority. It was He who played the trick of taking away the brāhmaṇa's baby as well as the arrows, including the one given by Lord Śiva, of which Arjuna was so proud. Anta-vat tu phalaṁ teṣāṁ tad bhavaty alpa-medhasām: "Less intelligent men take shelter of the demigods due to bewilderment and are satisfied with the temporary benefits they award."

Renunciation Through Wisdom

We see that even intelligent men are sometimes bewildered by the illusory potency, māyā, and subscribe to demoniac ideas.

Renunciation Through Wisdom 2.8:

Then there are those so-called scholars who claim that they they alone know the scriptures and that all others are illiterate fools. Such "scholars" say that research of the holy texts clearly reveals that Kāraṇodakaśāyī Viṣṇu is the cause of this material creation and that Lord Kṛṣṇa, the son of Vasudeva and Devakī, is at best Viṣṇu's partial expansion. Thus we see that even intelligent men are sometimes bewildered by the illusory potency, māyā, and subscribe to demoniac ideas. How is it possible for such bewildered souls to accept that Lord Kṛṣṇa is the Supreme Personality of Godhead, the cause of all causes?

Light of the Bhagavata

It is the duty of the intelligent men to influence the members of the richer communities.

Light of the Bhagavata 21, Purport:

The intelligent class of men, the brāhmaṇas, are to inspire the kṣatriyas and vaiśyas in performing sacrifices for spiritual cultivation, and thus the cooperation of the brāhmaṇas, kṣatriyas, and vaiśyas uplifts the people in general, or the ordinary laboring class of men. As soon as this cooperation between the four classes of men in society stops and the basic principles of spiritual culture are neglected, the social structure of humanity becomes a second edition of animal life, based on the propensities of eating, sleeping, fearing, and mating. It is the duty of the intelligent men to influence the members of the richer communities—the kṣatriyas and vaiśyas—to sacrifice for spiritual culture. Only in this way can the tension between the capitalists and the laborers be well mitigated.

It is the duty of the intelligent men, the brāhmaṇas, to selflessly inspire the richer people to sacrifice for this purpose.

Light of the Bhagavata 21, Purport:

In this age of Kali, when a slight difference of opinion leads to quarrel, even to the extent of riots, it is the duty of the intelligent men, the brāhmaṇas, to selflessly inspire the richer people to sacrifice for this purpose. It is suggested herewith that the men of the intelligent class should not themselves try to become kṣatriyas or vaiśyas, nor should they engage themselves in the occupations of the various other classes; rather, the brāhmaṇas should simply guide them in spiritual cultivation, just as the wind carries the clouds to other places to pour water. The wind itself does not take up the responsibility for pouring water.

The most intelligent men in society are the saints and sages who have sacrificed everything for the service of spiritual culture.

Light of the Bhagavata 21, Purport:

The most intelligent men in society are the saints and sages who have sacrificed everything for the service of spiritual culture. Their duty is to travel throughout human society and inspire its members to engage themselves in acts of spiritual culture by sacrificing their words, money, intelligence, and life. That should be the theme of human life in order to make it a complete success. A society with no taste for spiritual culture is a blazing fire, and everyone in that fire perpetually suffers the threefold miseries. As clouds pour water on a blazing fire in the forest and thus extinguish it, the intelligent men who work as the spiritual masters of society pour water on the blazing fire of miseries by disseminating spiritual knowledge and inspiring the richer section of the society to help in the cause.

We must have first-class intelligent men to guide the society.

Light of the Bhagavata 27, Purport:

If we really want to cultivate the human spirit in society we must have first-class intelligent men to guide the society, and to develop the finer tissues of our brains we must assimilate vitamin values from milk. Devotees worship Lord Śrī Kṛṣṇa by addressing Him as the well-wisher of the brāhmaṇas and the cows. The most intelligent class of men, who have perfectly attained knowledge in spiritual values, are called the brāhmaṇas.

An intelligent man should be careful to know what sort of body is going to be awarded him.

Light of the Bhagavata 34, Purport:

The householders are allowed a pension from service so that they can live for a higher cultural life. But foolish men, reluctant even to accept this pension, want to artificially increase the duration of their life. Such foolish men should take lessons from the drying pools of water and should know, in their own interests, that life is eternal, continuing even after death. Only the body changes, whether spiritually or materially. An intelligent man should be careful to know what sort of body is going to be awarded him, and thus he must prepare for a better life in other planets, even if he is reluctant to go back to Godhead.

Sri Isopanisad

Of these three types of action, that which frees one from the bondage to karma is preferred by intelligent men.

Sri Isopanisad 2, Purport:

Actions that free one from the cycle of birth and death are called akarma. And actions that are performed through the misuse of one's freedom and that direct one to the lower life forms are called vikarma. Of these three types of action, that which frees one from the bondage to karma is preferred by intelligent men. Ordinary men wish to perform good work in order to be recognized and achieve some higher status of life in this world or in heaven, but more advanced men want to be free altogether from the actions and reactions of work. Intelligent men well know that both good and bad work equally bind one to the material miseries. Consequently they seek that work which will free them from the reactions of both good and bad work.

Whenever an intelligent man raises the question of these miseries before a so-called scientist, the scientist very cleverly replies that material science is progressing and that ultimately it will be possible to render man deathless, ageless and diseaseless.

Sri Isopanisad 14, Purport:

By its so-called advancement of knowledge, human civilization has created many material things, including spaceships and atomic energy. Yet it has failed to create a situation in which people need not die, take birth again, become old or suffer from disease. Whenever an intelligent man raises the question of these miseries before a so-called scientist, the scientist very cleverly replies that material science is progressing and that ultimately it will be possible to render man deathless, ageless and diseaseless. Such answers prove the scientists' gross ignorance of material nature.

The intelligent man sees oneness not in the variety of the bodies but in the spiritual identity.

Sri Isopanisad 17, Purport:

Here in the material world, material nature forces the living entity to change his body due to his different desires for sense gratification. These desires are represented in the various species of life, from germs to the most perfected material bodies, those of Brahmā and the demigods. All of these living entities have bodies composed of matter in different shapes. The intelligent man sees oneness not in the variety of the bodies but in the spiritual identity. The spiritual spark, which is part and parcel of the Supreme Lord, is the same whether he is in a body of a hog or in the body of a demigod. The living entity takes on different bodies according to his pious and vicious activities.