The whole world's looking for happiness, but few seem to find it. And it's no wonder, when we're told to seek it in pleasure, conspicuous consumption and narcissism--paths that end instead in self-destruction and despair. Amid so much confusion, one voice pierces through the clamor and offers real, lasting advice for finding "perfect joy" St. Francis of Assisi. This thirteenth-century Italian friar sought contentment as a restless youth, but...