1.4.15

There are then this Brahman, Kshatra, Vis, and Sudra. Among the Devas that Brahman existed Kshatriya through the (divine) Kshatriya, as Vaisya through the (divine) Vaisya, as Sudra through the (divine) Sudra. Therefore people wish for their future state among the Devas through Agni (the sacrificial fire) in these two forms did Brahman exist. Now if a man departs this life without having seen his true future life (in the Self), then that Self, not being known, does not receive and bless him, as if the Veda had not been read, or as if a good work had not been done. Nay, even if one who does not know that (Self), should perform here on earth some great holy work, it will perish for him in the end. Let a man worship the Self only as his true state. If a man worships the Self only as his true state, his work does not perish, for whatever he desires that he gets from that Self.