Thou art the supreme Brahman, the supreme Abode and Purity supreme. All the rishis, Devarshi Narada and Asita, Devala and Vyasa, have declared You as the eternal and self-effulgent Purusha, the primeval Deity, birthless and all-pervading; and You Yourself too declare to Me the same (Truth). (Bhagavad Gita Chapter X – Verse 12 – 13)
There can be no doubt about the truth of all this. I have learned it from the highest sources. All the great sages have taught it and you yourself have declared it. What greater proof do I need? No, Bhagavan, I believe. I believe.
O Keshava, I regard all that You tell Me as true. Verily, O Blessed Lord, neither the devas nor the danavas (demigods) know Your manifestation. (Bhagavad Gita Chapter X – Verse 14)
Who indeed can know the manifestations of Bhagavan in all their fullness?
O Purusha supreme, O Source of beings, O Bhagavan of beings, O God of gods, O Ruler of the universe, verily, You Yourself know Yourself by Yourself. (Bhagavad Gita Chapter X – Verse 15)
Bhagavan, You are the only instructor about Yourself. Not even Your conditioned nature as Bhagavan of the universe can be seen by others. You alone know Yourself, since, O Bhagavan, none else can know You.