BG Chap 15 - Kṛṣṇa maintains the the jīvas - by His illumination
It is Kṛṣṇa alone who accomplishes the material enjoyment for the jīva, who is attached to the material world, and it is He alone who accomplishes liberation for the jīva who desires freedom from the material world.
The light of the sun, moon and fire, which illuminates the whole universe belongs to Kṛṣṇa. Actions for attaining the jīva’s enjoyment according to his karma are accomplished by the light of the sun which has risen and the fire which is blazing. These actions cause happiness and destroy darkness and lethargy for the jīva. When the moon rises, there is nourishment of herbs, dissipation of heat and pain, and relaxation in the moonlight. The light which produces these effects in the sun, moon and fire is Kṛṣṇa’s vibhūti of light. In the spiritual world there is no need of sun, moon or fire as explained