The Vedapurusha Saptaha jnana yajna is a rite that promotes the welfare and prosparity of the whole of the mankind.
The Yajna Mantras delineate in God in variuos ways by declearing that all creation is Brahman and not something that is different and distinct. Yajna is ordained to cure the vision that perverts nature as not 'Brahman' Man has to pour into the fire the limited power into the fire the limited vision and earn in exchange the Larger Vision. Yajna is a sadhana or a spiritual exercises in sacrifice and surrender.