实现明天的唯一限制是我们今天的怀疑。

Happiness is rarely absent; it is we that know not of its presence.

To be happy, it is necessary to forget as well as to remember.

生命的最大用处是将它用于比生命更长久的事物上。

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

The harder the battle, the sweeter the victory.