If you can't be kind, at least be vague. - Judith Martin

Dear Miss Manners: What is the proper way to eat potato chips?
Gentle Reader: With a knife and fork. A fruit knife and an oyster fork, to be specific. Good heavens, what is the world coming to? Miss Manners does not mind explaining the finer points of gracious living, but she feels that anyone without the sense to pick up a potato chip and stuff it in their face should probably not be running around loose on the streets.

One of the major mistakes people make is that they think manners are only the expression of happy ideas. There’s a whole range of behavior that can be expressed in a mannerly way. That’s what civilization is all about — doing it in a mannerly and not an antagonistic way. One of the places we went wrong was the naturalistic, Rousseauean movement of the Sixties in which people said, ”Why can’t you just say what’s on your mind?” In civilization there have to be some restraints. If we followed every impulse, we’d be killing one another.

It is, indeed, a trial to maintain the virtue of humility when one can't help being right.