SB 10.69.38

vidāma yoga-māyās te
durdarśā api māyinām
yogeśvarātman nirbhātā
bhavat-pāda-niṣevayā

vidāma - we know; yoga-māyāḥ - the mystic potencies; te - Your; durdarśāḥ - impossible to see; api - even; māyinām - for great mystics; yoga-īśvara - 0 Lord of all mystic power; ātman - O Supreme Soul; nirbhātāḥ - perceived; bhavat - Your; pāda - to the feet; niṣevayā - by service.

Text

[Nārada said:] Now we understand Your mystic potencies, which are difficult to comprehend, even for great mystics, O Supreme Soul, master of all mystic power. Only by serving Your feet have I been able to perceive Your powers.

Purport

According to the ācāryas, this verse indicates that even great mystics like Lord Brahmā and Lord Śiva cannot fully comprehend the mystic power of the Supreme Lord.

Srimad Bhagavatam. Canto 10: The Summum Bonum

Chapter 69: Narada Muni Visits Lord Krishna's Palaces in Dvaraka. Text 38

[Nārada said:] Now we understand Your mystic potencies, which are difficult to comprehend, even for great mystics, O Supreme Soul, master of all mystic power. Only by serving Your feet have I been able to perceive Your powers.