A father knows about the birth and life of his son, because he witnesses it. But the birth and childhood of his father are beyond the ken of the son, because they occurred before he was born. Likewise, the devatās (celestial gods) and the ṛiṣhis (sages) cannot comprehend the real nature of the origin of God, who existed before they were even born.
And so, the Rig Veda states: “Who in the world can know clearly? Who can proclaim from where this universe was born? Who can state where this creation has come from? The devatās came after creation. Therefore, who knows from where the universe arose?”
Again, the Īśhopaniṣhad states: (Īśhopaniṣhad 4)[v2]