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。

I’ve learned that you have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

家不是一个地方，而是那些让你感到归属的人。

The advantages found in history seem to be of three kinds， as they result either from the mere situation of the climate and country or from the form of government and of the character of the people， or from those finer principles and morals， which may be called the recommendations of philosophy.

自然是无情且不可改变的，它不在乎其隐藏的原因和行为是否能为人类所理解。