Anandamaya - The Bliss Self
At the deepest level, the Self is pure bliss.
Beyond body, energy, mind, and intellect is the bliss sheath (anandamaya kosha). Even this is a covering - the Self is the source of bliss itself, not dependent on any condition.
From bliss these beings are born, by bliss they live, into bliss they return.
Bliss is not acquired but is our essential nature.
Taittiriya Upanishad