One of the greatest victories you can gain over someone is to beat him at politeness.
My father believed in toughness, honesty, politeness and being on time. All very important lessons.
Politeness is the art of choosing among your thoughts.
Madame de Stael
I don't think you should have to try to be nice, I think most people are nice. I think being cheerful and nice is just a politeness.
The ability to compromise is not a diplomatic politeness toward a partner but rather taking into account and respecting your partner's legitimate interests.