This section of the book is from the "Household Companion: The Home Book Of Etiquette" book.
Do not speak in a loud voice or assume a dictatorial tone, and if a statement is made which you know to be incorrect, be careful of the manner in which you correct the speaker. Suggest a correction, rather than make it; and if the matter is unimportant it is far better to let it pass unnoticed. There is nothing more unwise than to insist on trifles. Those who go abroad to correct the world's mistakes are apt to find themselves very frequently in hot water. If addressed in an offensive tone, it is the part of wisdom not to notice it; an intention even to insult or annoy can safely be passed over for the time being. One should consider the feelings of the other persons present, and not annoy them with personal affairs of a disagreeable character, nor permit others to force him into a quarrel in company. There is, of course, a limit of insult which a self-respecting man can not let pass; but to bear and forbear is the part of good manners. Quarrels can be left to bide their time, and there is no better way of repelling an inuendo than by ignoring it or treating it as unworthy of notice. Such a thing as a " scene " in society is, above all things, to be avoided. It is the insulter who loses social caste, not the insulted.