The discussion of The Great Gatsby begins today in my course on it—an entire course devoted to a 180-page book—and in rereading it, I was struck for the first time by the apparent irrelevance of the opening paragraphs. You’ll remember them. Nick Carraway, who has not yet divulged his name, quotes advice from this father, warning him, in much the same way the Los Angeles Review of Bookswarns reviewers of first-time authors, not to say anything if he can’t say something nice. Nick refle...