The wise man knows he knows nothing, the fool thinks he knows all.

清者自清，浊者自浊。

The wolf has a winning game when the shepherds quarrel.

螳螂捕蝉，黄雀在后。

The world is a ladder for some to go up and others to go down.

世界如阶梯，有人上有人下。

The world is but a little place, after all.

海内存知己，天涯若比邻。

Think twice before you do.

三思而后行。

Things at the worst will mend.

否极泰来。

Time and tide wait for no man.

时不我待。

Time cures all things.

时间是医治一切创伤的良药。

Time flies.

光阴似箭。

Time is money.

时间就是金钱。

Time lost cannot be won again.

时光流逝，不可复得。

Time past cannot be called back again.

时间不能倒流。

Time tries all.

路遥知马力，日久见人心。

Tit for tat is fair play.