The Īśopaniṣad is a hymn to that Personality of Godhead. It is not that the impersonal Brahman is denied; it is also described, but that Brahman is revealed to be the glaring effulgence of the body of Lord Kṛṣṇa. And in the Caitanya-caritāmṛta we learn that Lord Caitanya is Kṛṣṇa Himself. In other words, Śrī Kṛṣṇa Caitanya is the basis of the impersonal Brahman. The Paramātmā, or Supersoul, who is present within the heart of every living entity and within every atom of the universe, is but the partial representation of Lord Caitanya. Therefore Śrī Kṛṣṇa Caitanya, being the basis of both Brahman and the all-pervading Paramātmā as well, is the Supreme Personality of Godhead. As such, He is full in six opulences: wealth, fame, strength, beauty, knowledge and renunciation. In short, we should know that He is Kṛṣṇa, God, and that nothing is equal to or greater than Him. There is nothing superior to be conceived. He is the Supreme Person.