So jīvanaṁ sarva-bhūtānām: He is the life. He is the life. We can see in every step God. People say, "Can you show me God?" Yes. God is seen in so many ways. You just try to see. If you close your eyes, that "I shall not see God," then who can show you? But you can see God in every step. Jīvanaṁ sarva-bhūteṣu tapaś cāsmi tapasviṣu. Tapaś cāsmi, any kind of penance, any kind of perseverance, that is also God. Tapaś cāsmi tapasviṣu. Bījaṁ māṁ sarva-bhūtānāṁ viddhi pārtha sanātanam (BG 7.10). And bījam. Bījam means seed. The seed is sanātana, that is eternal. Sanātana means eternal. There is a gigantic tree, but what is the platform, what is the background of this gigantic tree seed? That small seed, that mustardlike grain, seed. That is the background of this large tree.
Bījaṁ māṁ sarva-bhūtānāṁ viddhi pārtha sanātanam. And that seed is eternal. The seed within me, within you, everyone, the seed is there. And as soon as the seed takes place in the mother's womb, the seed begins to fructify, little by little. Then it comes out. When it is properly developed with hands and legs and eyes, it comes out from the mother's womb. Then again develops, again develops. He becomes a boy, he becomes a youth, he becomes a... So many things, changes everything. But that seed is permanent. The body is changing, but the seed is there. Therefore it is sanātana.
It is very easy to understand how we change our body. We are changing our body every moment, imperceptibly. Imperceptibly, we are changing our body every, every moment, every second. So change of body is a fact. Therefore that bījam, that small particle, spark of spirit, that is sanātana. This body is changing. Now, when it is changed to another body, that means transmigration of the soul from one body to another. This is a fact, and it is not very difficult to understand. We are changing our body every moment.