I have found quite a universal rule which in this matter seems to me valid above all other, and in all human affairs whether in word or deed: and that is to avoid affectation in every way possible as though it were some rough and dangerous reef; and (to pronounce a new word perhaps) to practice in all thing a certain sprezzatura [nonchalance], so as to conceal all art and make whatever is done or said appear to be without effort and almost without any thought about it.