What is Hemingway's point to having the old man say i may not be as strong as i think i am?

Hemingway uses this line to convey the theme of humility and self-awareness. The old man's acknowledgment of his limitations reflects the idea that true strength comes not just from physical prowess, but also from understanding one's own vulnerabilities. This moment adds depth to the character and highlights the importance of acceptance and resilience in the face of challenges.