這些道理你懂嗎

Barking dogs don't bite.
吠狗不咬人。

What is done by night appears by day.
若要人不知，除非已莫為。

It's never too late to mend.
改過不嫌晚。

Man proposes, God disposes.
謀事在人，成事在天。

Running water does not get stale; a door-hinge is never worm-eaten.
流水不腐，戶樞不蠹。

Sweep before your own door.
正人先正已。

A hero is nothing but a product of his time.
時勢造英雄。

It is better to trust to valour than to luck.
靠運氣不如靠勇氣。

Ignorance is the mother of impudence.
無知是魯莽之源。

One careless move may lose the whole game.
一步不慎，滿盤皆輸。

Words are like bees, they have honey and a sting.
言語象蜜蜂，有蜜也有刺。

It's only the idle will be tired.
只有閑人才會感到疲倦。

There are two tragedies in life. One is to lose your heart's desire, the other is to gain it.
失去心中所欲的和得到心中所欲的，是人生的兩大悲劇。

Strong in action, gentle in method.
行動要堅強，方式要溫和。

He who mistrusts most should be trusted least.
最不信任別人的人最不應該得到信任。

Idleness is the root of all evils.
懶惰是萬惡之源。

Diligence redeems stupidity.
勤能補拙。

Beware beginning.
以謹慎開始。

A friend in need is a friend indeed.
患難見真情。

Barking dogs don't bite. 的廣東說法是"冇聲狗，咬死人"。還有一個題外的我以前的一個老師說的(不知是否原創)"The worst thing in life is not that class but trying to live that classes life"，好自為之。

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