What is to give light must endure burning.

There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.

Extraordinary claims require extraordinary evidence.

It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.

Religion is like a knife: you can either use it to cut bread, or stick in someone's back.

Experience without theory is blind, but theory without experience is mere intellectual play.

The cure for boredom is curiosity.There is no cure for curiosity.

Who the hell wants fourteen pairs of shoes when they go on holiday? I haven't had fourteen pairs in my life.

My loneliness was born when men praised my talkative faults and blamed my silent virtues.

Design is not just what it looks like and feels like. Design is how it works.

Do it again on the next verse, and people think you meant it.

By desiring little, a poor man makes himself rich.

I must not write a word to you about politics, because you are a woman.

Freedom is from within.

Maybe, just once, someone will call me 'Sir' without adding, 'You're making a scene.'

External nature is only internal nature writ large.

My government will be open. Anyone found guilty of corruption will be dealt with in accordance with the law. If you are corrupt you will have to hang your boots.

It is wonderful when you don't have the fear, and a lot of the time I don't ... I focus on what needs to be done instead.

No temptation can gravitate to a man unless there is that in his heart which is capable of responding to it.

We can work together for a better world with men and women of goodwill, those who radiate the intrinsic goodness of humankind.

Children's talent to endure stems from their ignorance of alternatives.