Īśvara, the Supreme Lord, Kṛṣṇa. Īśvara means the Supreme, īśvara means controller. But the supreme controller is Kṛṣṇa. Īśvaraḥ paramaḥ kṛṣṇaḥ (Bs. 5.1). Control everyone of us, we are controller. We control our family, our society, our business, our factory. There are different kinds of controller. So in that sense everyone is īśvara, but different types of īśvara. But the supreme īśvara.... Supreme means nobody controls Him, but He controls everyone. That is Supreme. Here we are controller, but we are also controlled, somebody else, superior than me. Therefore we cannot be called supreme controller. Supreme controller is Kṛṣṇa.