The grass is greener on the other side.
这山望着那山高。 

The greatest talkers are always least doers.
语言的巨人总是行动的矮子。 

The higher up, the greater the fall.
爬得高,摔得惨。 

The leopard cannot change its spots.
本性难移。 

The more noble, the more humble.
人越高尚,越谦虚。 

The more wit, the less courage.
初生牛犊不怕虎。 

The outsider sees the most of the game.
旁观者清。 

The pen is mightier than the sword.
笔能杀人。 

The pot calls the kettle black.
五十步笑百步。 

There are spots in the sun.
太阳也有黑点。 

There are two sides to every question.
问题皆有两面。 

There is a skeleton in the cupboard.
家家有本难念的经。 

There is kindness to be found everywhere.
人间处处有温情。 

There is no general rule without some exception.
任何法规均有例外。 

There is no medicine against death.
没有长生不老药。