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.人不犯我，我不犯人；人若犯我，我必犯人。

To err¹ is human.人非圣贤，孰能无过。

To know everything is to know nothing.什么都知道，一如什么都不知道。

To know oneself is true progress.人贵有自知之明。

Tomorrow never comes.我生待明日，万事成蹉跎。

Too much familiarity breeds contempt.过分熟悉会使人互不服气。

Too much knowledge makes the head bald.学问太多催人老。

Too much liberty spills all.自由放任，一事无成。

Too much praise is a burden.过多夸奖，反成负担。

To save time is to lengthen² life.节约时间就是延长生命。

Touch pitch, and you will be defiled³.常在河边走，哪有不湿鞋。

Troubles never come singly.福无双至，祸不单行。

Truth never grows old.真理永存。

Turn over a new leaf.洗心革面，改过自新。

Two dogs strive for a bone, and a third runs away with it.鹬蚌相争，渔翁得利。

Two heads are better than one.一个好汉三个帮。

Two of a trade seldom agree.同行是冤家。

Two wrongs do not make a right.别人错了，不等于你对了。