The only constant is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

如果你想飞翔，就必须放弃拖累你的东西。

A man's real possession is his memory. In nothing else is he rich, in nothing else is he poor.

The only thing worth writing about is the human heart in conflict with itself.

在科学工作中，那些拒绝超越事实的人很少能真正理解事实。

世界是一面镜子，反映出我们带给它的东西。