Wise men learn by other men's mistakes; fools by their own.

A good medicine tasks bitter.

Nothing great was ever achieved without enthusiasm.

A great ship asks for deep waters.

Nothing great was ever achieved without enthusiasm.(无热情成就不了伟业。)

Every man is his own worst enemy.

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While there is life, there is hope.（有生命便有希望/留得青山在,哪怕没柴烧）

Do not , for one repulse , give up the purpose that you resolved to effect .(William Shakespeare , British dramatist)

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