Dietrich Bonhoeffer (German:[ˈdiːtʁɪç ˈboːnhœfɐ]; 4 February 1906 – 9 April 1945) was a German Lutheran pastor, theologian, anti-Nazi dissident, and key founding member of the Confessing Church. His writings on Christianity's role in the secular world have become widely influential, and his book The Cost of Discipleship became a modern classic.