Bonhoeffer, who was 39 when he was hanged by the Nazis for his opposition to the regime. Bonhoeffer teaches us the importance of spiritual disciplines that can withstand changing circumstances. While away from home, living as a double agent and even in prison, Bonhoeffer devoted himself to Bible reading, letter writing, prayer and listening for God. In these days of solitude and waiting, he urges us to remain connected to the sources of our strength.