Quote Origin: It Is Not Enough to Succeed; One’s Best Friend Must Fail

Gore Vidal? La Rochefoucauld? W. Somerset Maugham? Wilfrid Sheed? Iris Murdoch? David Merrick? Genghis Khan? Larry Ellison? Anonymous? Question for Quote Investigator: Competition and jealousy are reflected in a family of closely related cynical sayings: I have heard different versions of these quotations credited to the epigrammatist La Rochefoucauld, the writer Gore Vidal, and the …