All we know is still infinitely less than all that remains unknown.

Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen. 　　

The beauty of mathematics is that it allows us to explore the universe without ever leaving our chairs.

学无止境的人比无所不知的人做得更好。

思维的多样性带来创新；人的多样性带来力量。

用心管理的森林才能长久存在。