If anything threatens your identity, you will not just be anxious but paralyzed with fear. If you lose your identity through the failings of someone else, you will not just be resentful but locked into bitterness. If you lose it through your own failings, you will hate or despise yourself as a failure as long as you live. Only if your identity is built on God and his love . . . can you have a self that can venture anything, face anything.

Timothy Keller
The Reason for God (Penguin Books, 2009), 165.