- Light travels faster than sound. That is why some people seem bright until you hear them speak.
- It is not the critic who counts, not the man who points out how the strong man stumbled, or where the doer of deeds could have done better. The credit belongs to the man who is actually in the arena; whose face is marred by the dust and sweat and blood; who strives valiantly; who errs and comes short again and again, because there is no effort without error or shortcoming; who knows the great enthusiasms, the great devotions and spends himself in a worthy cause; who at the best, knows in the end the triumph of high achievement, and who, at worst, if he fails, at least fails while daring greatly; so that his place shall never be with those cold and timid souls who know neither victory or defeat. --Theodore Roosevelt, Citizenship in a Republic, a speech at the Sorbonne, Paris, France (23 April 1910)
- "Years ago my mother used to say to me, she'd say, "In this world, Elwood, you must be," — she always called me Elwood — "In this world, you must be oh so smart, or oh so pleasant." Well, for years I was smart. I recommend pleasant. You may quote me." --Elwood P. Dodd, the movie Harvey
- An autocratic system of coercion, in my opinion, soon degenerates. For force always attracts men of low morality, and I believe it to be an invariable rule that tyrants of genius are succeeded by scoundrels. Albert Einstein, in Mein Weltbild (1931).