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Śrī Iśopaniṣad
has to penetrate beyond the twenty-four material elements and the glaring effulgence as well. Śrī  Īśopaniṣad  hints at this direction, praying for removal of the  hiraṇmaya-pātra , the dazzling covering. Unless this covering is removed, and unless one can perceive the Supreme Personality of Godhead as He is, factual realization of the Absolute Truth can never be achieved.
The  Paramātman  feature of the Personality of Godhead is one of three plenary expansions, collectively called  Viṣṇu-tattva . The  Viṣṇu-tattva  within the universe (one of the three principal deities—Brahmā, Viṣṇu and Śiva) is known as the  Kṣirodaka-śāyī Viṣṇu . He is the all-pervading  Paramātman  in each and every individual living entity. And the  Garbhodaka-śāyī Viṣṇu  is the collective Supersoul of all living entities. Beyond these two there is the  Kāraṇodaka-śāyī Viṣṇu  lying in the Causal Ocean. He is the Creator of all the universes. The  yoga  system teaches the serious student to meet such  Viṣṇu-tattvas  after overcoming the twenty-four material elements of cosmic creation. The culture of empiric philosophy helps one to realize the impersonal  Brahma-jyoti , which is the glaring effulgence of the transcendental body of Lord Śrī Kṛṣṇa. This is confirmed in the  Bhagavad-gītā  as well as in the  Brahma-saṁhitā  (5/40):
In the millions and millions of universes, there are innumerable planets, each and every one of them different from the others by cosmic constitution, and all of them situated in a corner of the  Brahma-jyoti . This  Brahma-jyoti  is the Personal ray of the Supreme Personality of Godhead, Whom I do worship.
This  mantra  of the  Brahma-saṁhitā  is the position of factual realization of the Absolute Truth, and the  Śruti mantra  of Śrī  Īśopaniṣad  under discussion is a confirmation of this  mantra  as a process of realization. It is a simple prayer to the Lord to remove the  Brahma-jyoti , so that one can see the real face of God.