" We should be glad of success, but not overly glad, and saddened by failure, but not too downcast, because our true joy in the future is guaranteed by God. So we are to enjoy but not be “engrossed” (I Corinthians 7:31) in things of this world. "

― Timothy J. Keller , The Meaning of Marriage: Facing the Complexities of Commitment with the Wisdom of God