As Napoleon Hill quotes: "A life of wealth enjoyed by a mind at peace comes most often to men who maintain a positive mental attitude. With definiteness of purpose you add great positive power to your own mental attitude, and you can use definite motives to sustain the actions which propel you toward your goal. At the same time you can set up spiritual guardians to keep your attitudes at a high "Yes" level, avoid conflicts of motive, tune-in on other positive minds."