Contemplation and political action defined the lives and work of six of the most inspiring Christian leaders of the twentieth century: Thomas Merton, Ernesto Cardenal, Daniel Berrigan, Shelia Cassidy, Desmond Tutu, and Mother Teresa. Each one embraced a silent, purposeful life of prayer, contemplation, and conversation with God, which the author contends was the very foundation for their public activism. Aguilar profiles these outstanding religious...