The Guardian has done us the favor of quoting from Stephen Sondheim’s Look, I made a Hat. The master’s observations are sensible, largely familiar (to critics), predictably acerbic — and only part of the story, because in spite of what artists often think, reviews are not written for them, but for readers. (Otherwise, why do our publishers pay us the big bucks?) Artists may listen in, if they choose, but as Sondheim says, why? Here it is.