All progress depends upon the unreasonable person.

Assassination on the scaffold is the worst form of assassination.

Security, the chief pretense of civilization, cannot exist where the worst of dangers, the danger of poverty, hangs over everyone's head.

You are all fundamentalists with a top dressing of science. That is why you are the stupidest of conservatives and reactionists in politics and the most bigoted of obstructionists in science itself. When it comes to getting a move on you are all of the same opinion: stop it, flog it, hang it, dynamite it, stamp it out.

Dying is a troublesome business: there is pain to be suffered, and it wrings one's heart; but death is a splendid thing -a warfare accomplished, a beginning all over again, a triumph. You can always see that in their faces.

Hell is paved with good intentions, not with bad ones. All men mean well.

Reminiscences make one feel so deliciously aged and sad.