“When you are right, you cannot be too radical; When you are wrong, you cannot be too conservative.”
Martin Luther King, Jr. (1929–1968) American clergyman, activist, and leader in the American Civil Rights Movement
1960s, Why We Can't Wait (1964)
Context: Someone once wrote: "When you are right, you cannot be too radical; when you are wrong, you cannot be too conservative." The Negro knows he is right.