tataḥ prāṇo mahān asuḥ

antah sarire-within the body; akasat-from the sky; purusasya-of Maha-Visnu; vicestatah-while so trying, or willing; ojah-energy of the senses; sahah-mental force; balam-bodily strength; jajne-generated; tatah-thereafter; pranah-living force; mahan asuh-the fountainhead of everyone's life.