“The real difference in the believer who follows Christ and has mortified his will and died after the old man in Christ, is that he is more clearly aware than other men of the rebelliousness and perennial pride of the flesh, he is conscious of his sloth and self-indulgence and knows that his arrogance must be eradicated. Hence there is a need for daily self-discipline.”

German Lutheran pastor, theologian and anti-Nazi dissident

Dietrich Bonhoeffer was a German Lutheran pastor, neo-orthodox theologian and anti-Nazi dissident, active in the 20th century. He was a founding member of the Confessing Church, and his writings made him widely known beyond theology. He is especially remembered for work on Christianity in the secular world, and for The Cost of Discipleship, published in 1937 and often described as a modern classic. He also stood firmly against the Nazi dictatorship, speaking out against the euthanasia program and the persecution of Jews. Arrested by the Gestapo in April 1943, he was held at Tegel Prison for a year and a half before being moved to Flossenbürg concentration camp.