Verse 15.12
यदादित्यगतं तेजो जगद्भासयतेऽखिलम् । यच्चन्द्रमसि यच्चाग्नौ तत्तेजो विद्धि मामकम् ॥ १५.१२ ॥
सूर्य में स्थित जो तेज सम्पूर्ण जगत् को प्रकाशित करता है तथा जो तेज चन्द्रमा में है और जो अग्नि में है —उसको तू मेरा ही तेज जान ।
The Blessed Lord spoken in His Divine Voice: Arjuna, you should realize and always remember that the beautiful and overwhelming light that comes from the sun and illuminates the whole universe, the soft and splendrous light that is emitted by the moon, and the radiant glow of a fire, all come from within Me and exist because of me alone.