Bhaga. Bhaga means opulence. Just like we sometimes speak "bhagavān." That comes from this word bhaga. Similarly, bhagavān. Bhagavān means the owner of all opulences. That is called bhagavān. There are now, nowadays, so many bhagavāns, but they are not owner of all opulences. Maybe partly. But God means, bhagavān means, samagrasya. Samagra means complete. One rich man can claim that, "I am owner of so many crores." Another can claim, "No, I have got one or two more crores more than you." Others may say . . . . so on, so on, so on, go on. But nobody can claim that "I am the owner of all opulences." But in the Bhagavad-gītā you will find, Kṛṣṇa claims, bhoktāraṁ yajña-tapasāṁ sarva-loka-maheśvaram (BG 5.29). Sarva-loka-maheśvaram, "The supreme proprietor of all the lokas." That is admitted by the śāstra.
In the Brahma-saṁhitā it is said, īśvaraḥ paramaḥ kṛṣṇaḥ (Bs. 5.1). Īśvara means controller, or the powerful man who controls. Take, for example, the president or the king. So there are many īśvaras, or controller. You are also īśvara; I am also īśvara. Because you also control at least your family members or some animals. So this controlling capacity is there in everyone, because we are part and parcel of Kṛṣṇa. But we are not supreme controller. We are controller of some entities, but we are controlled also by something superior. Therefore we are not absolute controller. We are relative controller. But about Kṛṣṇa it is said, īśvaraḥ paramaḥ kṛṣṇaḥ (Bs. 5.1). Paramaḥ means supreme. He controls everyone or everything, but He is not controlled by anyone. That is īśvaraḥ paramaḥ. We are īśvara. We control to . . . in our jurisdiction, but we are also controlled by somebody. Just try to understand. But in Kṛṣṇa's life you'll find that He controls everyone, but He is not controlled by anyone. Therefore He is called īśvaraḥ paramaḥ kṛṣṇaḥ.