我们将永不停止探索，而我们一切探索的终点，将是到达我们出发的地方，并且生平第一遭知道这地方。

There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.

I want to liberate America from fear. I want people to be afraid of the things that are really scary, like war and famine, not their neighbor because he has a different religion.

牙痛的人认为牙齿健康的人都快乐。穷人对富人也犯同样的错误。