Puṣṭa Kṛṣṇa: Sometimes people ask, Prabhupāda, that if one falls down into lower species of life like plants or animals, how then do they come again to the human form of life?
Prabhupāda: Yes. That is nature's way. Give them again chance to develop. From trees they become flies. That is the beginning of movement. Then from flies to birds, birds to beast, and beast to animal, er, human being. This is great chastisement. You cannot move even. Suffer torrents of rain, cyclone, scorching heat, pinching cold. Stand up for hundreds and thousands of years. Then, when the punishment is finished, then he becomes moving. If there is scorching heat he can move to some shelter. But he cannot move. They do not study all this science, why there are so many varieties of life, of different grades, wherefrom they are coming.
Puṣṭa Kṛṣṇa: The living entity, then, in the tree is actually conscious of its condition of life.
Prabhupāda: Eh?
Puṣṭa Kṛṣṇa: The living entity inside the tree is actually conscious of its condition of life.
Prabhupāda: Not advanced consciousness, but he is conscious. He feels. He feels.