Courageous people do not fear forgiving, for the sake of peace.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

I learned from a very young age that if I pursued the things that truly excited me, that they would reward in more important ways, like happiness.

Every man must do two things alone; he must do his own believing and his own dying.

Old age, believe me, is a good and pleasant thing. It is true you are gently shouldered off the stage, but then you are given such a comfortable front stall as spectator.

In time of war the laws are silent.