Why Emotional Beats in an Epic
Part of what makes an epic an epic is that the reader tries to get a panoramic view of life, to experience a wide range of human emotions. I think that Tolkien handled this well in LOTR. He has a lot of warmth and humor and nostalgia in early parts of the story, but then he builds up to terror, despair, and horror. There is some triumph and tragedy and a lingering sense of isolation and remorse for our hero, too.