Bhagavad Gita Chapter 15 Verse 12
भगवद् गीता अध्याय 15 श्लोक 12

यदादित्यगतं तेजो जगद्भासयतेऽखिलम्।
यच्चन्द्रमसि यच्चाग्नौ तत्तेजो विद्धि मामकम्।।15.12।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 15.12)
।।15.12।।सूर्यमें आया हुआ जो तेज सम्पूर्ण जगत्को प्रकाशित करता है और जो तेज चन्द्रमामें है तथा जो तेज अग्निमें है? उस तेजको मेरा ही जान।


English Translation of Sanskrit Commentary By Sri Shankaracharya's
15.12 Yat, that which is; aditya-gatam, in the sun, which abides in the sun;-what is that-the tejah, light, brilliance, radiance; which bhasayate, illumines, reveals; akhilam, the whole, entire; jagat, world; yat, that ulluminating light which is; candramasi, in the moon; ca, and yat, which is; agnau, in fire, the carrier of oblations; viddhi, know; tat, that; tejah, light; to be mamakam, Mine. That light belong to Me who am Visnu.
Or: The light that is Consciousness, which is in the sun, which is in the moon, and which is in fire, know that light to be Mine. That light belongs to Me who am Visnu.
Objection; Is it not that the light that is Consciousness exists eally in the moving and the non-moving? Such being the case, why is this particular mention, That light in the sun which৷৷.,etc?
Reply: This defect does not arise, because, owing to the abundance of the sattva ality, there can be an abundane [Ast. reads avistaratva (amplitude) in place of adhikya.-Tr.] (of Consciousness). Since in the sun etc. the sattva is very much in evidence, is greatly brilliant, therefore there is an abundance of the light (of Consciousness) in them alone. And so it (sun etc.) is specially mentioned. But it is not that it (Consciousness) is abundant only there. Indeed, as in the world, a face, though in the same position, is not reflected in wood, a wall, etc., but in a mirror etc. it is reflected according to the degree in which they are more and more transparent, so is it here.
Further,


English Translation of Commentary  - Dr. S. Sankaranarayan
15.12 See Comment under 15.14


English Translation of Ramanuja's Sanskrit Commentary
15.12 That brilliance of the sun and other luminaries which illumines the whole universe - that brilliance belongs to Me. Know that this capacity of illumining is granted to them by Me who have been worshipped severally by them.

Sri Krsna states that the power in the earth to support all those that reside on it belongs to Him alone:


Transliteration Bhagavad Gita 15.12Yadaadityagatam tejo jagad bhaasayate’khilam;
Yacchandramasi yacchaagnau tattejo viddhi maamakam.


Word Meanings Bhagavad Gita 15.12yat—which; āditya-gatam—in the sun; tejaḥ—brilliance; jagat—solar system; bhāsayate—illuminates; akhilam—entire; yat—which; chandramasi—in the moon; yat—which; cha—also; agnau—in the fire; tat—that; tejaḥ—brightness; viddhi—know; māmakam—Mine