Do you think your body has come from something void? No. Behind this body is your father, your mother. How can you say that everything has come out of void. This is all, I mean to say, less intelligence.
Whoever says like that, they are called asuras, or less intelligent. Less intelligent persons, they become asuras because they cannot calculate. They cannot think of. Their brain does not provide provision to think of all these things. A dull brain. But if you take the advice of great ācāryas, just like Rāmānujācārya, Śaṅkarācārya and Lord Jesus Christ, everything, every man will say: "Oh, there is God. There is God."
So we have to take instruction from them if we want to know the science of God. And here Lord Kṛṣṇa, He personally is saying. Īśvaraḥ paramaḥ kṛṣṇaḥ (Bs 5.1).
The Supreme Personality of Godhead, He has come before you. This Bhagavad-gītā is also His representation. Now, we are speaking of Bhagavad-gītā after five thousand years of Kṛṣṇa's disappearance, but because God is absolute, therefore these words left by God is also God. Whatever we are hearing just now, you should consider that we are hearing directly from Kṛṣṇa.