definite causes among them these 1 definiteness of purpose knowing what you want to desire 3 self-reliance 4 definiteness of plans 5 accurate knowledge knowing that your plan is sound 6 cooperation sympathy understanding and harmonious cooperation with others tend to develop persistence 7 willpower 8 Hemet persistence is the direct result of habit the ninth principle power of the mastermind it is in this section that Napoleon Hill describes the importance of forming a group of individuals sympathetic to your desire they may be