This interiorization of fire rituals, where life is conceptualized as an unceasing sacrifice and emphasis is placed on meditation occurs in the classic Vedic world, in the early Upanishads and other texts such as the Shrauta Sutras and verse 2.18 of Vedic Vaikhanasa Smarta Sutra.
This incorporation of fire rituals, where life is viewed as an ongoing offering and a focus on contemplation happens in the ancient Vedic realm, within early Upanishads and other texts like the Shrauta Sutras and verse 2.18 of Vedic Vaikhanasa Smarta Sutra.