This video explores a single, crucial habit shared by self-taught geniuses like Da Vinci, Tesla, and Einstein, which distinguishes them from others. The speaker argues that many people fail to reach their potential because they consume educational content passively, take ineffective notes, or never review them, leading to forgetting. The video introduces the Feynman technique as a foundation for active learning and then expands upon it, emphasizing the importance of understanding concepts at a fundamental level, breaking them down, and actively teaching them to others. It also highlights the power of physical learning tools like notebooks and index cards over purely digital methods, suggesting that spatial memory and tangible engagement are key to deeper learning and retention.