Vedas are the earliest sacred scriptures of Hinduism and are full of abstract hymns containing esoteric concepts. The Puranas were written later and use stories and characters to make those esoteric concepts more accessible. The Vedic brahman is a neuter noun, which means the vast, the boundless, and the infinite. Puranic Brahma is a proper noun referring to a form of God that is, very peculiarly and significantly, not worshipped.
