This evolutionary process is very nicely explained in Vedic literature. Asitims caturas caiva bhramadbhih jiva-jatisu

Expressions researched:
"Asitims caturams caiva jiva-jatisu" |"Asitims caturas caiva bhramadbhih jiva-jatisu" |"Asitims catvarams caiva, jiva-jatisu, laksams tan jiva-jatisu"

Bhagavad-gita As It Is Lectures

The Darwin theory, although they are giving some idea of progressive evolution, but he does not know what is the goal of life, why this progress is there. That these rascals they do not know. Simply just imagining, taking some whims from the Padma Purāṇa, Brahmā Vaivarta Purāṇa. Aṣitiṁś catvarāṁś caiva, jīva-jātiṣu, lakṣāṁs tān jīva-jātiṣu.

Lecture on BG 1.43 -- London, July 30, 1973:

Sādhya means what for this human form of life we have got. That is called sādhya, the goal, the goal of life. And sādhana. Sādhana means the activity by which we can attain, we can achieve that goal of life. This is called sādhya-sādhana. The Darwin theory, although they are giving some idea of progressive evolution, but he does not know what is the goal of life, why this progress is there. That these rascals they do not know. Simply just imagining, taking some whims from the Padma Purāṇa, Brahmā Vaivarta Purāṇa. Aṣitiṁś catvarāṁś caiva, jīva-jātiṣu, lakṣāṁs tān jīva-jātiṣu. There are 8,400,000 types of jīva-jātis. Aṣitiṁś catvarāṁś caiva lakṣāṁs tān jīva-jātiṣu. So this is already there. Brahmādbhiḥ. In this way the living entity is wandering in the cycle of transmigration of the soul. So from this, Mr. Darwin might have taken some hints, but he could not explain properly. He could not catch up that brahmādbhiḥ, who is wandering. So it is a chaos.

Srimad-Bhagavatam Lectures

Suffering, suffering, suffering, 8,400,000 forms of body, and we get... Aśītiṁś caturamś caiva jīva-jatiṣu. That is stated in the śāstra. This is an opportunity to understand Kṛṣṇa. This is human form of body. And if we don't accept Kṛṣṇa or don't try to understand Kṛṣṇa We must try. This is our business. Then we are misusing. Then māyā is there. Māyā is there means the laws are so automatic, māyā's law, that as soon as you do something, immediately the next stage is ready.

Lecture on SB 5.5.31 -- Vrndavana, November 18, 1976:

We are given this body by māyā. Māyayā. Bhrāmayan sarva-bhūtāni yantrārūḍhāni māyayā (BG 18.61). We are sometimes getting a human form of body, sometimes a tree's body, sometimes a demigod's body, sometimes an insect's body. Karmaṇā daiva-netreṇa jantor dehopapatti (SB 3.31.1). By karma we are forced to accept a certain type of body. You cannot say, "No, I don't want." That is not possible. "You have behaved like a dog. You got this human form of life for chanting Hare Kṛṣṇa mantra; instead of doing that, you have cheated. You have misused your opportunity like a dog and hog. You must accept." This is nature's law. Yaṁ yaṁ vāpi smaran bhāvaṁ tyajaty ante kalevaram (BG 8.6). We, by practice, we may be, appearance like a human body, but my mentality is just like a dog. I don't discriminate, yoni-vicara (?). I don't discriminate about eating. I eat everything, even up to stool like... That is going on.

So this is misuse of the human form of body, and as soon as we misuse, we are given by nature's law an opportunity. Yantrārūḍhāni māyayā (BG 18.61). Suffering, suffering, suffering, 8,400,000 forms of body, and we get... Aśītiṁś caturamś caiva jīva-jatiṣu. That is stated in the śāstra. This is an opportunity to understand Kṛṣṇa. This is human form of body. And if we don't accept Kṛṣṇa or don't try to understand Kṛṣṇa We must try. This is our business. Then we are misusing. Then māyā is there. Māyā is there means the laws are so automatic, māyā's law, that as soon as you do something, immediately the next stage is ready. The māyā hasn't got to do anything. Just like if you infect some disease, the next stage—then you must suffer from that disease. It is automatic, not that māyā has to come, and he has to convince you, "Sir, you have infected smallpox. Now you suffer from this smallpox." No, automatically it takes. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). Everything is going on systematically. You cannot change. That is called destiny. Destiny means that so long we are under the laws of nature, that is to happen.

General Lectures

By the laws of nature, we get another form of life. We are evolving by the evolutionary theory. It is not theory. Of course, Mr. Darwin has called it theory, but in the Padma Purāṇa, Vedic literature... This evolutionary process is very nicely explained in Vedic literature. Aśītiṁs caturaś caiva bhramadbhiḥ jīva-jātiṣu. These Sanskrit words are there in the Padma Purāṇa, that "A living entity is traveling or evolving from lower grades of life to the higher grades of life in 8,400,000 species of life."

Lecture at International Student Society -- Boston, May 3, 1969:

We do not know wherefrom we have come in this place, where we have to go. Neither they have any information whether there is life after death. Very gross understanding, just like animals. Animal is standing, eating some grass. Although next moment he'll be taken to the slaughterhouse and he'll be killed, but he has no information. He is very happy eating the grass. And even if it is informed, "My dear Mr. Ox, you are eating grass here very happily. Just half an hour after you will be taken to the slaughterhouse. You go away from this place," but he has no knowledge. The grass-eating is very palatable to him than to take protection from being killed. So this is called ignorance, ignorance, sleeping state. Therefore the Veda is crying, uttiṣṭham jāgrata prāpya varān nibodhatam, kṣurasya dhārā niśitā duratyayā: "You have got now this human form of life, a great boon, not like animal. Please do not therefore waste your time sleeping like animals simply in the matters of eating, sleeping, mating and defending." That is the verdict of Vedas. Vedaiś ca sarvair aham eva vedyaḥ (BG 15.15).

Therefore, human life should be very much responsible. This life is the preparation for the next life. Next life we have always, but we do not know what kind of life we are getting next. That we should know. That is the business of human form of life, not to waste life like animals and evolve. By the laws of nature, we get another form of life. We are evolving by the evolutionary theory. It is not theory. Of course, Mr. Darwin has called it theory, but in the Padma Purāṇa, Vedic literature... This evolutionary process is very nicely explained in Vedic literature. Aśītiṁs caturaś caiva bhramadbhiḥ jīva-jātiṣu. These Sanskrit words are there in the Padma Purāṇa, that "A living entity is traveling or evolving from lower grades of life to the higher grades of life in 8,400,000 species of life." There are 900,000 species of life in the water. There are 2,000,000 species of life of plants and vegetables. Similarly, microbes, reptiles, there are 1,100,000 species of life. Then birds, 1,000,000 species of life. Then beasts, four-legged beasts, there are 3,000,000 species of life. Then, from beastly life, he comes to the human form life. There also variety, 400,000's of varieties. In this way we come to the point of civilized human form of life. The evolution is coming. Just like we evolve our body or grew our body from the womb of our mother. It is stated... Everything is there in the Vedic literature. After the sex intercourse of the man and woman, there is an emulsification of the two kinds of secretion. And in the first night there is a pealike form that takes place. Then he grows, growing. Then many holes come out of that pealike form—that becomes our eyes and other nine holes. In this way the body is developed in seven months. Then the child gets consciousness, and he feels very much inconvenience. Therefore moves this side, that side. Then, if he is fortunate, he prays to God, "My Lord, please save me from this inconvenience, this position." Just imagine, airtight packed. In this way he comes up and cries, and again grows. But after coming out, he does not..., he forgets in what position he was. But mother, father takes care. He forgets, again grows. So this evolution is going on. In the material stage of our life, we have got birth, growth, sustenance, by-product, then dwindling, then this body vanishes, again accepting another body. This is called cycle of birth and death. But in this human form of life one can understand what he is, what is this world, who is controlling, what is God, what is his relationship with God, what is this time factor, what are his activities. These things are to be learned, not that simply like animals, cats and dogs and hogs, whole day working for getting food. You see?