Good Forever

In the end of the 3rd paragraph when he's about to catch the fish he tells himself that he cannot handle many more turns that the fish will make. But then he has a moment of confidence and says "Yes you are, you're good for ever." I feel like this goes more towards the Legacy of Hemingway instead of his suicide note part because he starts to doubt everything that he has ever done but in the end he feels that what he has done would last for ever, even after his death.