St. Camillus de Lellis (1550–1614) was a wild, undisciplined youth who became a battle-hardened soldier with a violent temper and a gambling addiction. His bad behavior, combined with a persistent war wound in his leg, left him in poverty. He found work doing odd jobs at a Capuchin friary. Gradually the good influence of the friars inspired him to a better life, and he experienced a true...