Satchitananda - Being, Consciousness, Bliss
The threefold nature of Brahman.
Brahman is characterized as Sat (pure being), Chit (pure consciousness), and Ananda (pure bliss). These are not attributes but the very nature of the absolute.
Brahman is being, consciousness, infinite.
Satchitananda describes the experience of Brahman-realization.
Taittiriya Upanishad