The key to success is to keep trying, even when things don't work out the first time.

We are all of us made by what we have done, and what has been done to us.

你不必总是和别人在一起才能快乐。你可以独自快乐。

路是通过行走创造的。

"The only person you should try to be better than is the person you were yesterday."

物理学中的每一个发现都打开了一扇通向新奥秘的门，这就是科学的美丽之处。

The best way to be happy is to love yourself.