Makhanlāl: In the living entities such as the trees, which are very much limited in consciousness and ability to move also, are these... It mentions in the purports that they have been very lusty. This tends to show that they have been once before in human form and then have really fallen. But is it also the case that there are, amongst the forms, many souls that are on the process of evolution and going upward in the same way?
Prabhupāda: Yes. Just like you are stepping some staircases. You go to the second floor or third floor, but some way or other, you fall down again. So you have to cross again the steps. Do you follow? That does not mean because you crossed all the steps and went to the third floor... Now you have fallen down. You have to cross again.
So there is a regular evolutionary process from trees to worms, reptiles, from reptiles to birds, from birds to beasts, varieties of beasts, and from beasts to human life. These are the stepping stone, evolutionary process. But even if you are human being, if you fall down to the category of the trees, then you have to again go up step by step. You have to come to the form of the worms and reptiles, then birds, then beasts.
Therefore we should not miss this chance. This is intelligence. If I miss this chance, then I do not know where I am falling down again. So there is no teaching. There is no knowledge in the whole world. They are driven out just like animals. This educational institution, universities—there is no department of knowledge how the living entities are working, how they are being transmigrated, they are falling down, how they are... No. A very risky civilization. So people should try to understand this Kṛṣṇa consciousness philosophy very seriously if they at all want their own good.