How does Melchizedek explain the concept of personal legend how does the old man explain why few people attain their personal legend?

In Paulo Coelho's "The Alchemist," Melchizedek explains the concept of a personal legend as an individual's true purpose or destiny in life, emphasizing the importance of pursuing one's dreams and desires. The old man reveals that many people fail to attain their personal legend because they become sidetracked by fear, societal expectations, or complacency, ultimately settling for a life that lacks passion and fulfillment. He encourages individuals to recognize and overcome these obstacles to achieve their true potential.