The act of writing is an act of optimism. You wouldn't take the trouble to do it if you felt it didn't matter.

"The only thing that is truly valuable is time."

Words have the power to heal the wounds that reality inflicts.

Change starts with a single step, but it takes a collective effort to make it last.

写作是唯一一件当我做它时，我不觉得我应该在做其他事情的事情。

It is the duty of the human understanding to understand that there are things which it cannot understand.

A coward is incapable of exhibiting love； it is the prerogative of the brave.

Every problem in mathematics is an opportunity to learn something new.