At age forty-four, Penelope Niven was at a turning point in her life. In need of a change for both body and spirit, she decided to learn how to swim. While discovering the restorative effect of the water, she also began to notice that the lessons she was learning in the pool drew remarkable parallels with the lessons of life. The way in which you first get into the water, for example, is similar to trying anything new-you can jump in feet first, or...