Prabhupāda: The life comes from the man. The living entity takes shelter of the semina, and the semina is discharged in the womb of the woman, and if the situation is favorable, then the living entity remains there and that body develops. This is pregnancy. And that yoni, that mother, is situated, selected by daiva-netreṇa, by superior management: "This man has worked..., this living entity has worked in such a way, he should go to such and such womb." Then if he goes to a queen's womb he becomes a prince; if he goes to the dog's womb he becomes a dog. The mother gives the body. And the superior's order is there, "Now you must go to the dog's womb. He must go to the queen's womb." Otherwise, how it is from the birth one is prince, another is dog, if there is no superior? Who likes to become a dog? No. But according to his karma, by superior arrangement, he has to take. Kāraṇaṁ guṇa-saṅgo 'sya sad-asad-yoni-janmasu (BG 13.22). He has infected the contamination of material modes of nature, and he must develop a type of body according to that consciousness. Just like if you contaminate some disease, germ, then you must suffer from that disease. This is the mystery of birth. Kāraṇaṁ guṇa-saṅgo 'sya sad-asad-yoni-janmasu. Otherwise, why there are difference of varieties of life? Sat, asat, something good, something bad. That he does not know. He works independently, defies the laws of nature, and becomes implicated. And on account of dull brain, he is punished, "Stand up here for ten thousands of years. Become a tree," that's all. That is the result of his dullness. "Remain here for ten thousand years, a dull brain. Even one cuts, you cannot protest. You suffer all kinds of natural disturbances." This is very sinful when you become a tree. And they do not make any distinction between life and matter. These things are going on. There is no knowledge, and they are passing as scientist, as philosopher. Why varieties of life? What is the scientific explanation? One life, he is prince; one life, he is tree. Why this difference? Is there any explanation? There must be some explanation. It is also life, it is also life. Why one life has got this prince body, another this tree body? Kāraṇam..., Bhagavad-gītā, kāraṇaṁ guṇa-saṅgo 'sya (BG 13.22). The cause is association of different types of material modes of nature. If you keep yourself dull as the tree, without associating with the modes of goodness, without becoming a brāhmaṇa, then you become a tree. That's all. And if you become a brāhmaṇa, then develop your association with goodness and go back to home, back to Godhead. Therefore human life should be fully engaged, athāto brahma jijñāsā, simply for understanding Brahman. And as soon as you understand brahma-jānāti iti brāhmaṇa, then you are brāhmaṇa. And as soon as you are brāhmaṇa, then you act as a brāhmaṇa, sattva śamo damas titikṣā ārjavaṁ jñānaṁ vijñānam āstikyaṁ brahma-karma svabhāva-jam (BG 18.42). Then you become Vaiṣṇava. When you become Vaiṣṇava, tad viṣṇoḥ paramaṁ padaṁ sadā paśyanti, you are hankering after Viṣṇu. Then your life is success. And to keep them dull brained, like these trees and mountains, that is the greatest disservice in the human society. They have got the capacity to become a brāhmaṇa, and they are keeping him just like a dull-brained mountain and tree. That we want to stop this. It is suicidal, suicidal to the human society. They have got the chance of becoming a brāhmaṇa, and they are keeping them as dull-brained trees and mountains. The modern civilization, most harmful civilization. Denying the facility. One has got the capacity to become a brāhmaṇa, and they are denying the facility, to keep him to remain like hogs and dogs. Whole day and night, work hard to find out some stool, and as soon as we get some stool, a little strength, then have sex without any discrimination. This is civilization. The Vedic civilization forbids: nāyaṁ deho deha-bhājāṁ nṛloke kaṣṭān kāmān arhate viḍ-bhujāṁ ye (SB 5.5.1). If you have created a civilization like the hogs who are working day and night hard to find out some stool, and as soon as he eats some stool, his sex power is agitated, and he doesn't care whether mother, sister or daughter, that is hog's life, hog civilization. Work day and night, and have sex. This is hog civilization. And next life become a tree, become a dull-headed tree, a dull-headed stone, mountain. Or dull-headed elephant. Who knows the laws of creation, how one becomes elephant, how one becomes hog, how one becomes a demigod? Do the scientists know it? Then? Where is the knowledge? The knowledge is "Wait for million years, then you'll see life." Just see.