The Vedas are the original scientific knowledge for all departments of understanding, and this knowledge of the Vedas was first impregnated into the heart of Brahma by the Supreme Personality of Godhead. Therefore Brahma is the original source of all scientific knowledge. He is born directly from the transcendental body of Garbhodakasayi Visnu, who is never seen by any creature of this material universe and therefore always remains unmanifested. Brahma is stated here to be born of the unmanifested. He is the incarnation of the mode of passion in material nature, which is the separated, external energy of the Supreme Lord.