Every act of will is an act of self-limitation. To desire action is to desire limitation. In that sense, every act is an act of self-sacrifice. When you choose anything, you reject everything else.

He is a [sane] man who can have tragedy in his heart and comedy in his head.

I have argued with him on almost every subject in the world, and we have always been on opposite sides, without affectation or animosity... It is necessary to disagree with him as much as I do, in order to admire him as I do; and I am proud of him as a foe even more than as a friend.

We talk of wild animals, but the wildest animal is man.

We all feel the riddle of the earth without anyone to point it out. The mystery of life is the plainest part of it. The clouds and curtains of darkness, the confounding vapors, these are the daily weather of this world.

The old assumption of the approximate impossibility of war really rested on a similar assumption about the impossibility of evil-and especially of evil in high places.

The prophet and the quack are alike admired for a generation, and admired for the wrong reasons.