āditya-vat

ज्ञानेन तु तदज्ञानं येषां नाशितमात्मनः

āditya-vat — like the sun

But for those in whom that ignorance of the self has been destroyed by knowledge, knowledge lights up the highest as the sun lights up everything.

कविं पुराणमनुशासितार मणोरणीयांसमनुस्मरेद्यः

āditya-varṇam — effulgent like the sun

One who remembers the ancient seer, the ruler, subtler than the subtlest, upholder of everything, unthinkable, radiant as the sun and beyond the dark —

यदादित्यगतं तेजो जगद्भासयतेऽखिलम्

āditya-gatam — in the sun

The radiance that is in the sun, which lights the whole world, and what is in the moon and in fire — know that radiance to be mine.