How does the sacrifice yield desired enjoyments? Lord Krishna answers this here. By yagna or worship and appeasement one pleases the devas or demi- gods, who in turn please the offerer with prosperity and abundance. Thus mutually gratifying each other both humans and the devas will be happy and attained the highest good.

Lord Krishna explains that by yagna which is worship and appeasement of the devas or demi-gods who are His universal administrators of the material existence and who constitute His body and of whom He is the atma or soul within. Later in chapter IX.xxiv beginning with aham hi sarva we will see Him confirm that He is the sole enjoyer and rewarder of all yagnas. So let the demi-gods of whom Lord Krishna is the atma be worshipped so they will grant all prayers of prosperity and abundance. In this way by mutually offering services mankind shall reap its summum bonum and highest beatitude.

To answer the question how will yagna or worship fulfill one’s prayers Lord Krishna reponds that the devas or demi-gods nourished by the oblations offered will in turn mutually reciprocate fulfilling all one’s prayers with properity and abundance. Gratifying each other as such human and deva will all attain the fulfillment of their desires.