Life is not so short but there is time enougn for courtesy.

人生虽短，但表示礼貌的时间还是足够的。

Messengers should neither be headed nor hanged.

两国相争，不斩来使。

Poverty is not a shame, but the being ashamed of it is.

贫非耻，耻贫乃耻。

Prosperity gains (or makes) friends, and adversity tries them.

顺境交朋友，逆境试真情。

The falling out of lovers is the renewing of love.

情人越吵越亲密。

Those who climb high often have a fall.

爬得高往往跌得重。