Śrī Kṛṣṇa, the Personality of Godhead, is the Absolute Truth. This is corroborated in all authentic scriptures. Our spiritual life begins to develop as soon as our relationship with Śrī Kṛṣṇa is reawakened. Śrī Kṛṣṇa is compared to the sun. The darkness of nescience disappears as soon as our relationship with Śrī Kṛṣṇa is established. With the appearance of Śrī Kṛṣṇa within our heart, we become cleansed of the impurities of material contact, much as the morning appears new and fresh with the appearance of the sun. This is not a concoction of childish imagination but a factual experience of spiritual realization. One who has sincerely followed the footsteps of Śrī Kṛṣṇa or His bona fide servants has also realized this simple truth.
But one who envies Śrī Kṛṣṇa and poses himself as a competitor of Śrī Kṛṣṇa—one with such a foolhardy and perverted mentality does not accept this statement of fact. Thus, without understanding the primacy of karma-yoga, the foolish mundaners indulge in unrestricted material activities resulting in bondage; their very work keeps them in the material existence of births and deaths perpetually. Such foolish mundaners actually envy Śrī Kṛṣṇa and deride Him as one who is like other mundaners. The truth about Śrī Kṛṣṇa does not easily enter into the perverted brain of such mundaners infected with the empiric approach to philosophy. But a devoted person faithfully understands just what is actually stated in the pages of Bhagavad-gītā and does not resort to imagination, or the empiric philosophical approach, generally called "spiritual interpretation." Only such a devoted person can accept the logic of fully surrendering unto Kṛṣṇa and can thus adopt the process of karma-yoga to escape the dangerous bondage of work.
There is nothing in the codes of Śrī Kṛṣṇa to stipulate that these devoted persons will make their appearance within the boundaries of a particular caste, creed, color, or country. These devoted persons can and do appear everywhere, without any restriction of caste, creed, color, or country. So everyone, whatever and whoever he may be, is eligible to be a devotee of Śrī Kṛṣṇa. To confirm this fact, in Bhagavad-gītā the Personality of Godhead says the following words: "O son of Pṛthā, even those who are faithless and are of lower birth—including fallen women or professional prostitutes, ignorant manual laborers, and the merchant class—all shall attain perfection and reach the Kingdom of God, if they actually take shelter of the devotional service of the Personality of Godhead, Śrī Kṛṣṇa." In other words, the unscrupulous caste system now dominant in the society of the asuras or the faithless cannot be any barrier to approaching Śrī Kṛṣṇa, the Absolute Personality of Godhead.
Śrī Kṛṣṇa Himself has enumerated the basic principles of a caste system that is real and universal. The four social orders (intellectual, administrative, mercantile, and laborer) are set by Him according to the qualities these persons have acquired through their actions under the modes of nature. So although in one sense He is the maker of this caste system all over the world, still, in another sense, He is to be understood as not its maker. That is, He is not the maker of a tyrannical and unnatural caste system in which the faithless dictate one's position according to one's birth. Rather, He is the maker of a caste system that is applicable universally, is voluntary and natural, and is based on one's qualities and abilities.
The four social orders—generally known as the "caste system" and consisting of the brāhmaṇas (priests and intellectuals), the kṣatriyas (administrators and soldiers), the vaiśyas (merchants and farmers), and the śūdras (laborers)—were never meant for a caste system by birthright. This system is universally applicable in terms of one's mundane, practical qualifications and personality traits. The classification of brāhmaṇa, kṣatriya, vaiśya or śūdra is never made with reference to one's accidental birth—any more than someone could become a medical practitioner by some mere birthright, simply because he happened to be the son of a noted doctor. The real qualification of a medical practitioner can be obtained only through strenuous study of medical science for a considerably long period, and only upon completion of his studies can he take up the medical profession. Naturally, when a patient goes to a medical practitioner, he does not look at the birthright of the physician, but at his real, professional qualifications.
Just as physicians are always present in all countries and at all times, so also brāhmaṇas or kṣatriyas are always present in every part of the earth, by dint of personal and practical qualifications. The present caste system—which we have localized within a particular part of the world and then within a particular sectarian faith—is undoubtedly wrong and a perversion of the natural, universal caste system. If somebody passes himself off as a medical practitioner for the reason that he is the son of a medical practitioner—without having any knowledge of medical science or without having attended medical college—and if this medical practitioner is accepted as such by a section of the public, then both this medical practitioner and his blind followers are to be considered members of a society who cheat one another and are cheated by one another. Theirs is a society of the cheaters and the cheated. So the caste system created by the Personality of Godhead, Śrī Kṛṣṇa, and referred to in the Bhagavad-gītā is not the same as the caste system of the society of the cheaters and the cheated. The caste system created by the Personality of Godhead and referred to in the Bhagavad-gītā is universally true at all times and in all parts of the world, and actually, the universe.
The qualifications of the various orders of the caste system are enumerated in Bhagavad-gītā, and here we shall touch on them briefly. The brāhmaṇas are the highest social order, and they imbibe the modes of goodness and are engaged in the activities of equality, restraint, and forgiveness. The kṣatriyas are the second-highest social order, and they imbibe the qualities of creative passion and are engaged in the activities of public leadership as executive heads of different political and social bodies. The vaiśyas are the third social order. They imbibe mixed qualities, namely creative passion as well as the darkness of ignorance, and generally they are engaged as farmers and merchants. The śūdras are the lowest social order, inasmuch as they imbibe the modes of darkness, or ignorance, and generally take up the service of the other three social orders. As a class, the śūdras are servitors of the whole mundane social body. In the present age of darkness, which is known as the Kali-yuga, the age of quarrel, hypocrisy, and ignorance, virtually everyone is born a śūdra.
If we examine human affairs in the light of the caste system as created by the Personality of Godhead, surely we can visualize the four social orders functioning in every part of the world. In every part of the globe, wherever there is human habitation, there are some persons who have the qualifications of brāhmaṇas, and there are others who have the qualifications of kṣatriyas, vaiśyas, and śūdras. The various modes of nature are persistent in every corner of the universe, and since brāhmaṇas, kṣatriyas, and so forth are simply products of the modes of nature, how can one say that the four castes do not exist in a particular part of the world? This is absurd. In every country and at all times there have been, there are, and there will be the four social orders, according to the modes of nature.
Those who persist in the theory that the four social orders called the caste system exist only in India are totally mistaken. In all other countries, also, there are the same orders of life, under some name or other. And thus everywhere in the world, even those who are far below the qualifications of an ordinary śūdra, the fourth social order, are eligible for the transcendental service of the Personality of Godhead, Śrī Kṛṣṇa. The spiritual perfection which a qualified brāhmaṇa attains by the transcendental service of Śrī Kṛṣṇa can also be attained by anyone, even in a lower status than that of śūdra, by the same process of transcendental service to Śrī Kṛṣṇa. For this reason, Śrī Kṛṣṇa, the all-attractive Personality of Godhead, is the Absolute Truth in all creation, and Śrīmad Bhagavad-gītā is the supreme scripture within the universe. According to other scriptures such as the Purāṇas, even a caṇḍāla, or a person of the fifth social order (lower than a śūdra), becomes more than a person of the first order (a brāhmaṇa) by dint of his transcendental devotional service. The confidential teachings of the Bhagavad-gītā are therefore meant for nothing but attaining the highest perfection of human life—the transcendental service of Śrī Kṛṣṇa.
So, regardless of caste, creed, or color, everyone must adopt the process of karma-yoga, or work with transcendental results. And by so doing, everyone shall help to spiritualize all the activities of the world. By such activities, both the performer and the work performed become surcharged with spirituality and transcend the modes of nature. And as his activities become spiritualized, the performer automatically attains the qualifications of the highest social order, the brāhmaṇas. In fact, one who becomes fully spiritualized is transcendental to the modes of nature, and thus he is more than a brāhmaṇa. After all, although of the highest mundane order, the qualifications of a brāhmaṇa are not transcendental. How one can attain to the supreme transcendental knowledge simply by the performance of transcendental service to the Personality of Godhead is explained in the twenty-fourth verse of the fourth chapter of Bhagavad-gītā. It is explained there that through performance of work with transcendental results, everything becomes spiritualized. Ācārya Śaṅkara's philosophy of "pantheism," which has spread a perverted interpretation of the Vedānta maxim that the Supreme Spirit is omnipresent, nonetheless has a practical bearing on the above verse.
There are various kinds of sacrifices that will be examined later on, but we should understand that the ultimate goal of all sacrifices is to please the Supreme Godhead, Viṣṇu. During our material existence, we have to deal with material objects, if only to keep body and soul together. But in all such material activities we can evoke the spiritual atmosphere, in terms of the Vedantic truth that the Supreme Spirit is omnipresent. This truth is imperfectly explained by the proponents of pantheism, the misconception that everything is the Supreme Spirit simply because the Supreme Spirit is everywhere. Once this misconception is cleared up and if we remember that the Supreme Spirit is indeed omnipresent, we can create a spiritual atmosphere by performing all our activities in relation to the Supreme Spirit, with everything directed by one who is a self-realized soul. Then the whole thing is transformed into spirit.
An example may be given here to illuminate the above process of spiritualization. When the iron is put into the fire and becomes red hot, the iron then develops the qualities of fire and stops functioning as iron. In the same way, when all our activities are done in terms of our relationship with Kṛṣṇa, then everything is surcharged with spiritualization. Because pleasing Kṛṣṇa has become our ultimate goal, all our activities have become spiritual activities. In a sacrifice there are five primary elements—namely, (1) the process of offering, (2) the offering itself, (3) the fire, (4) the sacrifice, and (5) the result of the sacrifice. When all of these elements become related with the Supreme Spirit, all of them become spiritualized; and at that time the whole thing becomes really a sacrifice. So when offered to the transcendental service of Śrī Kṛṣṇa, all the above-mentioned five elements become interrelated with Him, and thus they become totally spiritualized.