"Sometimes the hardest part isn't letting go but learning to start over."

The United States should not try to spread democracy around the world.

在古典音乐中，传统既是我们最宝贵的资产，也是最沉重的负担。

I never write Metropolis for seven cents because I can get the same price for city. I never write policeman because I can get the same money for cop.

在人工智能上度过的一年足以使人相信上帝。

Don’t let success go to your head or failure go to your heart.

这句话其实是莎士比亚借哈姆雷特之口说的，但是霍金非常喜欢，曾在自己著作中多次引用，所以很多人误以为本句话是霍金说的。

Love is the only thing that can make us forget the horror of existence.