The water that bears the boat is the same that swallows it up. 水能载舟亦能覆舟。

Observation is the best teacher. 观察是最好的老师。

Old friends and old wines are best. 陈酒味醇，老友情深。

Old skin makes new shame. 一失足成千古恨。

Once bitten, twice shy.一朝被蛇咬，十年怕井绳

One boy is a boy, two boys half a boy, three boys no boy.一个和尚挑水喝,两个和尚抬水喝,三个和尚没水喝。

Wet behind the ears.乳臭未干

One eyewitness is better than ten hear says.百闻不如一见。

One false move may lose the game.一着不慎,满盘皆输。

No shame in asking questions, even to people of lower status.不耻下问

No one knows a son better than the father.知子莫若父

Three humble shoemakers brainstorming will make a great statesman.三个臭皮匠，赛过诸葛亮

One hour today is worth two tomorrow.争分夺秒效率高。

One man‘s fault is other man’s lesson.前车之鉴。

Kill a chicken before a monkey. 杀鸡儆猴

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

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

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

Out of sight, out of mind.眼不见,心为静。

No wind, no waves. 无风不起浪

Penny wise, pound foolish.贪小便宜吃大亏

Pour water into a sieve.竹篮子打水一场空。

Pleasure comes through toil.苦尽甘来。

Practice makes perfect.熟能生巧。

Lift a stone only to drop on your own feet. 搬起石头砸自己的脚

Pride goes before, and shame comes after.骄傲使人落后。

Promise is debt.一诺千金

The tongue is not steel, yet it cuts.人言可畏。

There is no royal road to learning.书山有路勤为径，学海无涯苦作舟。

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

An inch of time is an inch of gold but you can't buy that inch of time with an inch of gold. 一寸光阴一寸金，寸金难买寸光阴。

Put the cart before the horse.本末倒置

Rome is not built in a day冰冻三尺,非一日之寒。

Seeing is believing.眼见为实。

Seek the truth from facts.实事求是。

If you have no hand you can't make a fist./ One cann't make bricks without straw.巧妇难为无米之炊

Love me, love my dog. 爱屋及乌。

Misfortunes never come singly. When it rains it pours. 屋漏偏逢连夜雨。

Birds of a feather flock together. 物以类聚，人以群分。

Only when all contribute their firewood can they build up a strong fire.众人拾柴火焰高

An ant may well destroy a whole dam. 千里之堤毁于蚁穴

Clear conscience never fears midnight knocking. 不做亏心事，不怕鬼敲门

One cannot refuse to eat just because there is a chance of being choked. 因噎废食

Don teach your grandmother to suck eggs. 鲁班门前弄大斧，关公面前耍大刀。

Diamond cuts diamond. 两虎相争必有一伤。强中更有强中手。

Don't change horses in midstream. 临阵莫换将。

Don't kick against the pricks. 勿以螳臂挡车。

Do nothing you would wish to conceal. 若要人不知，除非己莫为。

Despair gives courage to a coward. 人急造反，狗急跳墙。

Devil must be driven out with devils. 以毒攻毒。以其人之道还治其人之身

If a son is uneducated, his dad is to blame.子不教，父之过

Bad things never walk alone.祸不单行

A fall into a ditch makes you wiser.吃一堑长一智

One picture is worth ten thousand words.百闻不如一见

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 wit， the less courage. 初生牛犊不怕虎。

The tongue is not steel， yet it cuts.人言可畏。

Things of today, accomplished today. 今日事今日毕。

The frog in the well knows nothing of the great ocean.坐井观天。

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

The finest diamond must be cut.玉不琢，不成器。

Sell yourself short. 妄自菲薄

The farthest way about is the nearest way home.抄近路反而绕远路。

If you are patient in one moment of anger, you will escape a hundred days of sorrow. 忍一时风平浪静，退一步海阔天空

If you don't want anyone to know it,don't do it若要人不知，除非己莫为

There are many paths to the top of the mountain,but the view is always the same.殊途同归

While the green hills last, there’ll be wood to burn.留得青山在，不怕没柴烧。

The journey of a thousand miles starts with a single step.千里之行，始于足下。

When you drink from the stream remember the spring.饮水思源。

Your teacher can open the door but you must enter by yourself.师傅领进门，修行靠个人。

The friendship of a gentleman is insipid as water.君子之交淡如水