Napoleon Hill teaches that discipline is the bridge between vision and achievement. Thomas Edison’s story proves it—after thousands of failed attempts, he remained disciplined, refining his methods until he lit not just a bulb, but the entire world. This lesson reminds us that success is never built overnight, but through unyielding commitment and relentless action. #NapoleonHill #Discipline #ThomasEdison #SuccessMindset #Persistence #Greatness