This famous saying 100 years ago is a good testimony to James' current mentality. He will use his achievements to fight back at those critics and shoot his bullets. This passage is not only inspiring myself, but also obvious to the media.
From Cleveland to Miami, he was under a lot of pressure. Without a champion, everything would be a laughing stock, so he kept encouraging himself. Only such a player can gradually become great.
I hope my answer is helpful to you.