O best of the embodied beings, the physical nature, which is constantly changing, is called adhibhuta [the material manifestation]. The universal form of the Lord, which includes all the demigods, like those of the sun and moon, is called adhidaiva. And I, the Supreme Lord, represented as the Supersoul in the heart of every embodied being, am called adhiyajna [the Lord of sacrifice]. (Bhagavad-gita 8.4)