Manners are made up of trivialities of deportment which can be easily learned if one does not happen to know them; manner is personality - the outward manifestation of one's innate character and attitude toward life.... Etiquette must, if it is to be of more than trifling use, include ethics as well as manners. Certainly what one is, is of far greater importance than what one appears to be.
Emily PostCustom is a mutable thing; yet we readily recognize the permanence of certain social values. Graciousness and courtesy are never old-fashioned.
Emily PostThe fact that slang is apt and forceful makes its use irresistibly tempting. Coarse or profane slang is beside the mark, but "flivver," "taxi," the "movies," "deadly" (meaning dull), "feeling fit," "feeling blue," "grafter," a "fake," "grouch," "hunch" and "right o!" are typical of words that it would make our spoken language stilted to exclude.
Emily Post