Now who is that great? That is decided: īśvaraḥ paramaḥ kṛṣṇaḥ (Bs. 5.1). Kṛṣṇa is the Supreme Being. Īśvaraḥ paramaḥ kṛṣṇaḥ. Īśvaraḥ means controller. That is the exact equivalent for the word God. God means controller, supreme controller. So that supreme controller means He has nobody else to control Him. Here in this material world, or anywhere, we find one controller, he is controlling, but he is also being controlled. He is not absolute controller. Here we find some, say, a president, he's controlling the state, but he's also being controlled by popular votes. If the popular votes are against him, he cannot control any more. So here, you just analyze anyone; he may be controller, but at the same time he is controlled. Not that absolute controller. Nobody you can find. So if in this way you go on searching out where a person is not only controlled, controller, but He is not controlled by anyone, that is God. This is the simple definition of God. God controls everyone or everything, but He is not controlled by anyone. That is God.
Īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ (Bs. 5.1). And He has got form; He's a person. He's not imperson. Because as soon as you speak of controller, it cannot be impersonal. Controller must be a person. He must have brain, He must have desire, He must have capacity to give orders. So many things. So therefore the Vedic information is the Supreme Absolute Truth is a person. He's not impersonal.