一个人就是他所有不幸的总和。你以为不幸终会疲倦,但时间本身就是你的不幸。
Mathematics allows us to see the hidden structures that govern the world around us.
The only freedom which deserves the name is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it.