When you go into public, let your dress be genteel, and suitable to your age and station of life. He that does otherwise, shows a contempt of the wor… - Giovanni della Casa

We ought to esteem him alone an agreeable and good-natured man, who, in his daily intercourse with others, behaves in such a manner as friends usually behave to each other. For as a person of that rustic character appears, wherever he comes, like a mere stranger: so, on the contrary, a polite man, wherever he goes, seems as easy as if he were amongst his intimate friends and acquaintance.

It is moreover extremely indecent to spit, cough, and expectorate (as it were) in company, as some hearty fellows are apt to do: and more so, when you have blown your nose, to draw aside and examine the contents of your handkerchief; as if you expected pearls or rubies to distil from your brain.

For tho' it is certainly more laudable, and a thing of greater moment, to be generous, constant, and magnanimous, than merely to be polite and well bred; yet we find, from daily experience, that sweetness of manners, a genteel carriage, and, polite address are frequently of more advantage to those who are so happy as to be possessed of them, than any greatness of soul or brightness of parts are to those who are adorned with those more shining talents. For those slighter accomplishments are of more frequent, or rather of constant and daily use on every occasion; as we are under a necessity of conversing daily with other people: Whereas justice, fortitude, and those other more exalted virtues, are of much less frequent occurrence. For neither is a generous or a brave man obliged to exhibit those virtues, every hour of the day (which indeed would be impossible,) neither has a wise man, or a man of great genius, an opportunity of displaying those extraordinary talents, but very rarely. As much therefore as those greater qualities exceed those more trifling accomplishments in weight and importance; so much the latter exceed the former in number and more frequent use.