We must substitute courage for caution. Auteur: Martin Luther King Jr. Copy Quote More from Martin Luther King Jr. “I've seen too much hate to want to hate, myself.” “Life's most persistent and urgent question is, 'What are you doing for others?” “The conservatives who say, "Let us not move so fast," and the extremists who sa…” “When you are right, you cannot be too radical; When you are wrong, you cannot b…”