The brilliance in the sun that lights up the whole world, the brilliance in the moon, and the brilliance in fire: know that brilliance to be mine.
Explanation
Krishna has just said that those with a trained mind can see the Self within, while the unprepared cannot. Now he points to something everyone can see: the light of the sun, moon and fire. He says this radiance (tejas) is his, meaning the divine is the source of all illumination in the world. Commentators differ on whether this describes God as the inner power of these things or as a being distinct from yet sustaining them.