If you think you are beaten you are, if you think you dare not, you don't. If you like to win, but you think you can't, it is almost certain you won't.
Napoleon HillDiscipline comes through self control. This means that you must control all negative qualities. Before you can control conditions, you must first control yourself. Self-mastery is the hardest job you will ever tackle. If you do not conquer self, you will be conquered by self.
Napoleon HillThe Creator gave us the complete, unchallengable right of prerogative over the one thing, and only thing we own, our mind.
Napoleon Hill