Politeness costs little (nothing), but yields much.
Английские пословицы и поговорки
Poverty is not a shame, but the being ashamed of it is.
One man's meat is another man's poison.
Never cast dirt into that fountain of which you have sometime drunk.
Many a true word is spoken in jest.
Never do things by halves.
Money spent on the brain is never spent in vain.
No man is wise at all times.
Judge not of men and things at first sight.
If an donkey bray at you, don't bray at him.
There’s nowt so queer as folk (meaning — There’s nothing as strange as people).