As the proverb says, "Your tongue has the power of life and death."

正如谚语所说：“话语有令人生存或者死亡的力量（是非都是从口中传出来的）。”

youdao

As the proverb says, honesty is the best policy.

正如谚语所说，诚实为上策。

youdao

An old Arab proverb says, "The enemy of my enemy is my friend."

有一句古老的阿拉伯谚语说：“我敌人的敌人是我的朋友。”

《柯林斯英汉双解大词典》

But another proverb says too many cooks spoil the broth.

VOA: special.2009.08.30

As the proverb says, a journey starts with a single step so begin with the pile closest to you and just set aside one hour at a time to go through each piece of paper and decide immediately whether you will recycle it, toss it, delegate it, file it or deal with it right away or later.

FORBES: De-clutter, Detox & De-dupe: a recipe for success in the new year

As the Greek proverb says, why does anybody plant the seeds of a tree whose shade they will never see?

BBC: In full: Brown's speech to Congress

As the Russian proverb says, a fish tends to rot from the head.

ECONOMIST: Corruption in ex-communist countries