Hindu Monotheism

If by monotheism we mean the idea of a single transcendent God who creates the universe out of nothing (creatio ex nihilo), as in the Abrahamic religions, then that is not found in the history of Hinduism. But if we mean a supreme, transcendent deity who impels the universe, sustains it and ultimately destroys it before causing it to emerge once again, who is the ultimate source of all other gods ...