每个人心中都有一个深渊。有时你会凝视它，有时你不会。

You can have all the talent in the world, but if you don’t work hard, it won’t matter.

To find out what one is fitted to do, and to secure an opportunity to do it, is the key to happiness.

The only limit to our realization of tomorrow will be our doubts of today.

宇宙是一个相当大的地方。如果只有我们，那似乎是对空间的极大浪费。