Out, out, brief candle! Life's but a walking shadow, a poor player That struts and frets his hour upon the stage And then is heard no more. It is a tale Told by an idiot, full of sound and fury, Signifying nothing, 

善可以存在于没有恶的情况下，而恶无法在没有善的情况下存在。

Children are the most honest critics; they will tell you exactly what they think.

组织的质量由其系统的质量决定。

The best buildings come from good clients who trust the architect.