“Fanatics think that their single-minded principles qualify them to do battle with the powers of evil; but like a bull they rush at the red cloak instead of the person who is holding it; they exhaust themselves and are beaten. They get entangled in non-essentials and fall into the trap set by cleverer people.”
Dietrich Bonhoeffer, Letters and Papers from Prison (1967; 1997), p. 4.