Martin Luther was studying to be a priest, but he struggled with doubts about his life as a Christian. When he discovered the power of prayer, it began to change his life. Then he made another great discovery that would change the world. One day he found a complete copy of the Bible chained to a pulpit in the library at the University of Erfurt in Germany. In reverence and awe, he turned the sacred pages and read the wonderful verses he had never before seen.