I have no use for people who exhibit manners.
Good manners have much to do with the emotions. To make them ring true, one must feel them, not merely exhibit them.
Do not speak of repulsive matters at table.
One face to the world, another at home - makes for misery.
The best-dressed women I know pay very little attention to the picayune aspects of fashion, but they have a sound understanding of style.
Only a great fool or a great genius is likely to flout all social grace with impunity, and neither one, doing so, makes the most comfortable companion.