One prayer can change everything. Martin Luther. Sojourner Truth. Helen Keller. St. Patrick. We read their stories, and of other people like them, in history books, and hear about the amazing things they did to change the world. But one part of the story is often left out: Each one of them wouldn’t have accomplished what they did without prayer. These are the stories of twenty-five notable people and the prayer that changed their lives, and changed history.