The essence of science is not in the knowing but in the seeking.

Courage is the most important of all the virtues, because without courage you can't practice any other virtue consistently.

考验和冒险之间的区别在于你的态度。

"A lie can travel halfway around the world while the truth is putting on its shoes."

I don't think about the past, I just think about the future.

"Language is both a weapon and a wound; it depends on who holds the pen."

"To live is the rarest thing in the world. Most people exist, that is all."

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。