But it is the same with man as with the tree. The more he seeks to rise into the height and light, the more vigorously do his roots struggle earthword, downword, into the dark, the deep - into evil.

我们在开采中做出的每一个决定都会影响几代人。

做数学就是探索一个无限的思想景观。

"Books are the windows to other cultures."

The monument is a fixed point in the changing city.

The only freedom which deserves the name is that of pursuing our own good in our way， so long as we do not attempt to deprive others of theirs or impede their efforts to obtain it.