Dietrich Bonhoeffer Quote

The essence of optimism is not its view of the present, but the fact that it is the inspiration of life and hope when others give in; it enables a man to hold his head high when everything seems to be going wrong; it gives him strength to sustain reverses and yet to claim the future for himself instead of abandoning it to his opponent.

Letters and Papers from Prison, 1943–45 (1953)