"Any idea, plan, or purpose may be placed in the mind through repetition of thought." Napoleon Hill

• These 17 principles are;

  1. Definiteness of Purpose,
  2. Mastermind Alliance,

• Going the Extra Mile,

• Pleasing Personality,
• Personal Initiative,
• Positive Mental Attitude,
• Enthusiasm,
• Self-Discipline,
• Accurate Thinking,
• Controlled Attention,
• Teamwork,
• Adversity & Defeat,
• Creative Vision,
• Health,
• Budgeting Time & Money,
• Habits,

Reference

Napoleon Hill's 17 Principles of Personal Achievement (success.com)