A boaster and a liar are cousins-german.

吹牛与说谎本是同宗。

A bully is always a coward.

色厉内荏。

A burden of one's choice is not felt.

爱挑的担子不嫌重。

A candle lights others and consumes itself.

蜡烛照亮别人，却毁灭了自己。

A cat has 9 lives.

猫有九条命。

A cat may look at a king.

猫也可以打量国王，意为人人平等。

A close mouth catches no flies.

病从口入。

A constant guest is never welcome.

常客令人厌。

Actions speak louder than words.

事实胜于雄辩。

Adversity leads to prosperity.

穷则思变。

Adversity makes a man wise, not rich.

逆境出人才。

A fair death honors the whole life.

死得其所，流芳百世。

A faithful friend is hard to find.