Hard work and perseverance are the keys to overcoming any challenge.

Happiness is not out there for us to find. The reason that it’s not out there is that it’s inside us.

"Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence."

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。