In so many different ways, Kṛṣṇa is convincing how the spirit soul is immortal. In different ways. Avyakto 'yam. It is not manifest to the blunt material eyes. We cannot see, because as we have explained several times, the magnitude of the soul is one ten-thousandth part of the tip of the hair, very small. I think smaller than the atom. That spirit soul is everywhere. Sarva-ga. Sarva-gata. Everywhere.
Aṇḍāntara-stha-paramāṇu-cayāntara-stham (Bs. 5.35). And wherever the spirit soul is there within this material world, he has got a body and there is heart, and within that heart Kṛṣṇa is also there. Īśvaraḥ sarva-bhūtānāṁ hṛd-deśe arjuna tiṣṭhati (BG 18.61). Both of them living there. Therefore, aṇor aṇīyān mahato mahīyān: Kṛṣṇa can become greater than the greatest and the smaller than the smallest. This is God.
When Kṛṣṇa was playing as a child, He ate earth, and the playmates complained to Mother Yaśodā: "Mother, your son Kṛṣṇa is eating earth." Mother Yaśodā called for explanation: "Kṛṣṇa, why You are eating earth? I have given You sandeśa." Kṛṣṇa said: "No, mother, I have not eaten." "No, Your friends are complaining." "No, they have become My enemies this morning. We had some quarrel, therefore they have combined together to make Me chastised by you." So in this way . . . then Mother Yaśodā wanted to solve this problem, "All right, show Your mouth, open Your mouth. I want to see." And when Kṛṣṇa opened the mouth, the mother saw innumerable universes are within the mouth.
This is Kṛṣṇa.