The cross and resurrection, suffering, and overcoming death were central themes in Dietrich Bonhoeffer's theological work. Throughout his life, he focused on these themes, trying to disclose their relevance for human life and actions and to answer the question "What does it mean to be a Christian?" These letters and sermons contain Bonhoeffer's personal and faithful word about the crucifixion and the power of the cross for all Christian disciples. They strengthen our assurance and hope that through the cross and resurrection Christ addresses people at the center of their lives and does not abandon them.