In "The Old Man and the Sea", Santiago said: "A person can be destroyed, but he cannot be defeated." Combined with the characters, tell us your understanding of this sentence

This sentence not only embodies the declaration of mankind's resistance to fate, but also a true portrayal of Hemingway's heart. In the article, the old man faced no harvest for 84 days and faced disdainful speculation from people, but he still went to sea without hesitation. It's not so much for survival as it is to prove one's strength and show one's youth to outsiders. Human life is a struggle and a unremitting struggle against fate. Perhaps these challenges and struggles are enough to destroy the human body, but as long as a person maintains a strong fighting spirit and an unyielding spirit in the face of any difficulties and obstacles, he will always be the winner. ——The determination and courage to never give up, overcome all difficulties and obstacles, and defeat all enemies