He said, "Come." So Peter got out of the boat and walked on the water and came to Jesus; but when he saw the wind, he was afraid, and beginning to sink he cried out, "Lord, save me." Jesus immediately reached out his hand and caught him, saying to him, "O man of little faith, why did you doubt?" 

Matthew 14:29-31

A man who governs his passions is master of his world. We must either command them or be enslaved by them. It is better to be a hammer than an anvil.

- St. Dominic de Guzman