“Anyone who has played improvisational music with others is familiar with the virtuoso who has great skill and expertise but bad social sensitivity. In performance, he tears into melodic acrobatics, but never listens enough to know when to stop, or hand it over to another player, or modify and adapt to the aural environment. His narcissism undoes his own musicality. And it can go the other way too, since the overly shy improviser never gets courage enough to assert his musical ideas. A psychological balance of humility and hubris facilitate good improvisation, not just in music but in art, science and business.”