"Righteousness is the natural and essential food of the soul, which can no more be satisfied by earthly treasures than the hunger of the body can be satisfied by air. If you should see a starving man standing with his mouth open to the wind, inhaling draughts of air as if in hope of gratifying his hunger, you would think him a lunatic. But it is no less foolish to imagine that the soul can be satisfied with worldly things."
- Bernard of Clairvaux