In displaying the psychology of your characters, minute particulars are essential. God save us from vague generalizations! Be sure not to discuss your hero's state of mind. Make it clear from his actions. Nor is it necessary to portray many main characters. Let two people be the center of gravity in your story: he and she.
It is permissible even for a dying hero to think before he dies how men will speak of him hereafter. His fame lasts perhaps two thousand years. And what are two thousand years?... What, indeed, if you look from a mountain top down the long wastes of the ages? The very stone one kicks with one's boot will outlast Shakespeare.