悲观主义者在每个机会里看到困难。乐观主义者在每个困难里看到机会。
There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.
The money and effort that men expend on their bodies, they might with greater profit devote to their minds.