Decency, or a proper regard to age, sex, character, and station in the world, may be ranked among the qualities which are immediately agreeable to others, and which, by that means, acquire praise and approbation. An effeminate behaviour in a man, a rough manner in a woman; these are ugly because unsuitable to each character, and different from the qualities which we expect in the sexes. It is as if a tragedy abounded in comic beauties, or a comedy in tragic. The disproportions hurt the eye, and convey a disagreeable sentiment to the spectators, the source of blame and disapprobation. This is that INDECORUM, which is explained so much at large by Cicero in his Offices.
Among the other virtues, we may also give Cleanliness a place; since it naturally renders us agreeable to others, and is no inconsiderable source of love and affection. No one will deny, that a negligence in this particular is a fault; and as faults are nothing but smaller vices, and this fault can have no other origin than the uneasy sensation which it excites in others; we may, in this instance, seemingly so trivial, clearly discover the origin of moral distinctions, about which the learned have involved themselves in such mazes of perplexity and error.
But besides all the AGREEABLE qualities, the origin of whose beauty we can, in some degree, explain and account for, there still remains something mysterious and inexplicable, which conveys an immediate satisfaction to the spectator, but how, or why, or for what reason, he cannot pretend to determine. There is a manner, a grace, an ease, a genteelness, an I-know-not-what, which some men possess above others, which is very different from external beauty and comeliness, and which, however, catches our affection almost as suddenly and powerfully. And though this MANNER be chiefly talked of in the passion between the sexes, where the concealed magic is easily explained, yet surely much of it prevails in all our estimation of characters, and forms no inconsiderable part of personal merit. This class of accomplishments, therefore, must be trusted entirely to the blind, but sure testimony of taste and sentiment; and must be considered as a part of ethics, left by nature to baffle all the pride of philosophy, and make her sensible of her narrow boundaries and slender acquisitions.
We approve of another, because of his wit, politeness, modesty, decency, or any agreeable quality which he possesses; although he be not of our acquaintance, nor has ever given us any entertainment, by means of these accomplishments. The idea, which we form of their effect on his acquaintance, has an agreeable influence on our imagination, and gives us the sentiment of approbation. This principle enters into all the judgements which we form concerning manners and characters.