Sprezzatura

[…] I have found quite a universal rule which in this matter seems to me valid above all others, 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 very rough and dangerous reef; and (to pronounce a new word perhaps) to practice in all things a certain sprezzatura [nonchalance]^([sic]), 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.

Cassandra Wilson's music is the essence of sprezzatura, or calculated nonchalance, that special attitude described nearly 500 years ago by Baldassare Castiglione in “The Courtier,” his primer on how to ingratiate yourself with the aristocracy.

Mr. Mork played with soulful intensity (and impeccable intonation), and the interplay between him and Mr. Repin, with nicely coordinated gestures and phrasings, was enjoyable to watch. But Mr. Repin’s technical struggles were all too evident — the very opposite of sprezzatura.

In men's fashion the ultimate style move is sprezzatura, embracing intentional errors such as undone buttons and misaligned neckties. Gianni Agnelli, the head of Fiat, wore watches over his shirtsleeves.