Don't put off till tomorrow what should be done today.

今日事今日毕。

Diligence is the mother of success.

失败是成功之母。

It's never too late to learn.

活到老，学到老。

Walls have ears.

隔墙有耳

Wash your dirty linen at home.

家丑不可外扬

Waste not, want not.

俭则不匮

Weak things united become strong.

一根筷子易折断，十根筷子硬如铁

Wealth is best known by want.

人穷方知钱可贵

We can't judge a person by what he says but by what he does.

判断一个人，不听言语看行动

We only live once, but if we work it right, once is enough.

年华没虚度，一生也足矣。

What is done by night appears by day.

若要人不知，除非已莫为

When a man is going down-hill, everyone will give him a push.

墙倒众人推

When children stand quiet, they have done some harm.