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

Etiquette is about all of human social behavior. Behavior is regulated by law when etiquette breaks down or when the stakes are high - violations of life, limb, property and so on. Barring that, etiquette is a little social contract we make that we will restrain some of our more provocative impulses in return for living more or less harmoniously in a community.

Fairness does not consist so much of everybody's doing the same thing, but of everybody's being willing to do something that others don't want to do.

The etiquette of intimacy is very different from the etiquette of formality, but manners are not just something to show off to the outside world. If you offend the head waiter, you can always go to another restaurant. If you offend the person you live with, it's very cumbersome to switch to a different family.

'Honesty' in social life is often used as a cover for rudeness. But there is quite a difference between being candid in what you're talking about, and people voicing their insulting opinions under the name of honesty.

everyone old enough to have a secret is entitled to have some place to keep it.

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