In Book X of the Hymns of the Vedas, a sacred book of Brahman religion, the story of Creation describes how Purusha, the Male principal, was a primordial giant; a cosmic man. The different parts of the world are his limbs, and in his unity this individual includes the first sacrificer and the first victim. By Purusha Atom, one presumably means this unity of parts that existed before the universe came into being as separate parts in nature.