我想把美国从恐惧中解放出来。我希望人们害怕真正可怕的事情，比如战争和饥荒，而不是因为邻居有不同宗教信仰就害怕他。
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.
The dead are always looking down on us, they say. But we don't look back.
可归约性的概念对于理解不同计算问题之间的关系至关重要。
意识就像一条河流——你永远无法两次踏入同一条思想之流。
The process of discovery is very beautiful.