SB 4.22.9
naiva laksayate loko
lokan paryatato ’pi yan
yatha sarva-drsam sarva
atmanam ye ’sya hetavah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Prthu Maharaja continued: Although you are traveling in all planetary systems, people cannot know you, just as they cannot know the Supersoul, although He is within everyone’s heart as the witness of everything. Even Lord Brahma and Lord Siva cannot understand the Supersoul.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the beginning of the Srimad-Bhagavatam it is said, muhyanti yat surayah. Great demigods like Lord Brahma, Lord Siva, Indra and Candra are sometimes bewildered trying to understand the Supreme Personality of Godhead. It so happened that when Krsna was present on this planet, Lord Brahma and King Indra also mistook Him. And what to speak of great yogis or jñanis who conclude that the Absolute Truth, the Personality of Godhead, is impersonal? In the same way, great personalities and Vaisnavas like the four Kumaras are also invisible to ordinary persons, although they are traveling all over the universe in different planetary systems. When Sanatana Gosvami went to see Lord Sri Caitanya Mahaprabhu, he could not be recognized by Candrasekhara Acarya. The conclusion is that the Supreme Personality of Godhead is situated in everyone’s heart, and His pure devotees, the Vaisnavas, are also traveling all over the world, but those who are under the modes of material nature cannot understand the form of the Supreme Personality of Godhead, the source of this cosmic manifestation, or the Vaisnavas. It is said, therefore, that one cannot see the Supreme Personality of Godhead or a Vaisnava with these material eyes. One has to purify his senses and engage in the service of the Lord. Then gradually one can realize who is the Supreme Personality of Godhead and who is a Vaisnava.