Known around the globe for her indefatigable work on behalf of the poor, the sick, and the dying, Mother Teresa has devoted her life to giving hope to the hopeless in more than one hundred and twenty countries. She inspires us all to find a way to translate our spiritual beliefs into action in the world. How has one woman accomplished so much? And what are the guiding principles that have enabled this humble nun to so profoundly effect the lives of millions?