Piety is . . . a mode of living. It is the orientation of human inwardness toward the holy. It is a predominant interest in the ultimate value of all acts and feelings and thoughts. With his heart open to and attracted by some spiritual gravitation, the pious man moves, as it were, toward the center of a universal stillness, and his conscience is so placed as to listen to the voice of God.
— Abraham Joshua Heschel, Moral Grandeur and Spiritual Audacity by Abraham Joshua Heschel, Susannah Heschel, editor