What is the nature of God according to Hinduism?
God is one only, one without a second. His nature is Sat-chit-ananda, that is, eternal Existence-Consciousness Bliss. He is the creator of this universe.He creates it by His power out of Him self, sustains it and then withdraws it into Himself, once its purpose is over. This process goes on forever in a cyclic order.
Once this universe is brought into being, it is He who rules it like an emperor meting out rewards and punishments to the living beings in accordance with their merit and demerit. He is all-knowing, all-powerful, all-pervading, as also the indwelling controller of all beings. He is the repository of truth, knowledge and beauty; in fact, the perfect embodiment of all the great virtues that one can ever imagine. But compassion toward the bound and suffering souls is His cardinal virtue. In fact, the very creation of this world is for the uplift of these fallen beings so that they can gradually be raised to the spiritual plane, ultimately reaching perfection. He is fond of faith and devotion. It is easy to propitiate Him through self-surrender. If He is pleased, our life will become blessed.
He is both with form and without form. Not only that, He can incarnate Himself in this world to raise us from the brute level to divine heights.