Sat

Sat (devanāgarī: सत्) is a Sanskrit adjective meaning "the ideal; pure and true essence (nature)" of an entity or existence in the Vedanta. It can thus be related to the self-existent or Universal Spirit, Brahman.

In the Theosophical literature sat is frequently used to refer to the Absolute:

Sat (Sk.). The one ever-present Reality in the infinite world; the divine essence which is, but cannot be said to exist, as it is Absoluteness, Be-ness itself.

Further reading

• Sat at Theosopedia