" There are millions of human beings who live narrow, darkened, frustrated lives—who live defensively—simply because they take a defensive, doubtful attitude toward themselves and, as a result, toward life in general. A person with a poor attitude becomes a magnet for unpleasant experiences. When those experiences come—as they must, because of his attitude—they tend to reinforce his poor attitude, thereby bringing more problems, and so on. "

― Earl Nightingale , Lead the Field: An Official Nightingale Conant Publication (Earl Nightingale Series)