Bhagavad Gita · Chapter 15: The Supreme Person
Bhagavad Gita 15.12
यदादित्यगतं तेजो जगद्भासयतेऽखिलम् ।
यच्चन्द्रमसि यच्चाग्नौ तत्तेजो विद्धि मामकम् ॥
yadādityagataṃ tejo jagadbhāsayate'khilam | yaccandramasi yaccāgnau tattejo viddhi māmakam ||
The radiance in the sun that lights up the whole world, the radiance in the moon, and the radiance in fire: know that radiance to be mine.
Modern context
The light of the sun, the moon and fire is the divine light. Earlier the supreme abode was said to need no sun or moon. Here Krishna turns around: the sun and moon themselves shine with his light. The source that needs no light is the source of all light. Every sunrise and every lamp is, in a quiet way, a glimpse of the divine.