So ahaṁ brahmāsmi . . . dehino 'smin yathā dehe (BG 2.13). That Brahman, particle of Brahman, is there within the body. It is very small. You just study. It is stated that ātmā and Paramātmā, they are living together. And where is the ātmā, Paramātmā? The Paramātmā is stated also, īśvaraḥ sarva-bhūtānāṁ hṛd-deśe arjuna tiṣṭhati (BG 18.61). So everything . . . Paramātmā is within my heart, and I am sitting with Paramātmā, therefore I am also within the heart. So medical science, they also know. They take care of the heart. When the heart stops, then everything stops. That means when the ātmā goes out of the heart, it has no meaning. So in the small scale the whole construction of this body is dependent on that ātmā. So this is the example, that the ātmā is so small, one ten-thousandth part of the top of the hair; because that small particle is there within this body, therefore it is so beautiful, it is nicely working, the brain is working. Everything is there. Scientists, they are finding out, trying to find out what is the living force. Sometimes they are catching the blood; sometimes they are catching the cells, or this, or that . . . but failure, because they could not capture the ātmā. But ātmā is so small, it is not possible. Even you cannot see where it is. But it is perceived that there is something within this body, living force generally they call it. Therefore the body's working.
So . . . and the . . . it is spread all over the body. Yena sarvam idaṁ tatam. Avināśi tu tad viddhi yena sarvam idaṁ tatam (BG 2.17). That thing which is sarvam idaṁ tatam, spread all over the body as light, illumination . . . so I am ātmā, you are ātmā. So your illumination, consciousness, is spread all over the body. Therefore so long I am in this body, I feel pains and pleasure because the consciousness is spread. In the same way . . . as Kṛṣṇa says, He's the Supreme Soul. I am individual, very, very minute, small particle, and Kṛṣṇa is the Supreme Whole. So as I am controlling over this body, so where is the difficulty? Kṛṣṇa is controlling over the whole universe. Where is the difficulty? There is no difficulty. But we'll not understand. That is the difficulty. Here it is clearly said, mayi sarvam idaṁ protaṁ sūtre maṇi-gaṇā iva. There is no difficulty. In another place also, Kṛṣṇa says, mayā tatam idaṁ sarvam. Mayā. The original is person, mayā, aham. Mayā. So "by Me." Sarvam idaṁ tatam. How? That is already explained: by the two energies, the spiritual energy and the material energy, parā and aparā-prakṛti. That is expanded all over the universe, creation. So where is the difficulty? Mayā tatam idaṁ sarvam. Anything, that is Kṛṣṇa's energy. Therefore those who are devotee, Vaiṣṇava, they can understand that everything is Kṛṣṇa's. I am also Kṛṣṇa's energy; you are also Kṛṣṇa's energy, jīva-bhūtaḥ. Apareyam itas tu viddhi me prakṛtiṁ parām, jīva-bhūtām (BG 7.5). We are parā-prakṛti, all of us, living entities, part and parcel of Kṛṣṇa.