SB 10.74.4
na hy ekasyadvitiyasya
brahmanah paramatmanah
karmabhir vardhate tejo
hrasate ca yatha raveh
Translation:
But of course the power of the Absolute Truth, the Supreme Soul, the primeval one without a second, is neither increased nor diminished by His activities, any more than the sun’s power is by its movements.
Purport:
Srila Prabhupada writes in Krsna: “[King Yudhisthira said,] ‘Your real position is always exalted, exactly like that of the sun, which always remains at the same temperature, both during the time of its rising and the time of its setting. Although we feel the difference in temperature between the rising and the setting sun, the temperature of the sun never changes. You are always transcendentally equipoised, and thus You are neither pleased nor disturbed by any condition of material affairs. You are the Supreme Brahman, the Personality of Godhead, and for You there are no relativities.’”
Srila Sridhara Svami quotes a similar statement from the Vedic mantras: na karmana vardhate no kaniyan (Satapatha Brahmana 14.7.2.28, Taittiriya Brahmana 3.12.9.7 and Brhad-aranyaka Upanisad 4.4.23). “He is not increased by His activities, nor does He become lesser.” As explained here by King Yudhisthira, the Lord is one without a second. There is no other entity in His supreme category, and thus it is simply by His causeless mercy that He agrees to carry out the orders of His pure devotees, like Maharaja Yudhisthira. There is certainly no loss of status for the Supreme Personality of Godhead when He thus extends His causeless mercy to His surrendered devotees.