That is the first understanding of spiritual knowledge, that we change our body. I am spirit soul, every one of us, spirit soul, even the animals and the trees and plants and aquatics, any living being. There are 8,400,000 different forms of living being. Of all of them, the human form is considered the best. Best means it has got..., the human form has got developed consciousness. Developed consciousness means they can understand what is past, what is future, what is present. Especially to understand his position as spirit soul, to understand God, to understand what is His relation with God, and what he should do in that relationship—these things are understandable in the human form of life, not otherwise. We cannot invite dogs and cats to come here and hear about Śrīmad-Bhāgavatam. No. That is not possible. But a human being, he can hear. He can understand.
So this is our special opportunity after evolutionary process passing through eight million..., at least eight million different forms of life. The list is there in Padma Purāṇa. Jalajā nava-lakṣāni: "Nine lakhs' forms of life within the water." There is animal in the water which is called timiṅgila. It is so big that... We have got experience. The whale fish is very big. That whale fish is taken up by this timiṅgila fish just like a big fish swallows a small fish. Such big, big fishes are there within the... They do not come visible to the..., but there are. We get information. Timiṅgila. Many very big, big animals are there within the water, deep. So there are nine lakhs, 900,000 forms of life within the water. And then jalajā nava-lakṣāni sthāvarā lakṣa-viṁśati.