Chapter 15: Purushottama-yoga: / Verse 13

Krishna first referred to the luminaries like the sun being illumined by the Supreme. Here now he denotes how the same inner splendour enters the entirety of the earth and thereby supports all forms of vegetation.

For supporting life on earth, we need sunlight and sunrays. Likewise we need the moon to sustain all kinds of herbs and their distinct tastes and properties.

The plants and their blossoming depend significantly on the moon. Paddy seeds are selectively exposed to moon-rays for improving their quality. Life forms need sunlight and heat. For herbal life likewise, moonlight is indispensable.

Krishna says the moon derives its nourishing property from the inmost Self, as does the sun its brilliance.