"Far be it from me, Lord, far from the heart of your servant who is making confession to you, far be it from me to think myself happy, whatever the joy in which I take my delight. There is a delight which is given not to the wicked (Isaiah 28:22), but to those who worship you for no reward save the joy that you yourself are to them. That is the authentic happy life, to set one's joy on you, grounded in you and caused by you. That is the real thing, and there is no other. Those who think that the happy life is found elsewhere, pursue another joy and not the true one. Nevertheless, their will remains drawn towards some image of the true joy."
Saint Augustine, Confessions, page 198-199