Epiphanies are an essential part of storytelling. A protagonist who comes to understand or realize something fundamental about his world, or discover something that can change the course of his journey, or find something that makes him believe he can succeed, or will never succeed, or reveals something that dynamically shifts his approach, or throws him off his game, or gives him what he believes to be an advantage, etc., has likely faced an epiphany. Epiphanies work best when they are bold, big, important, eye-opening, reenergizing, demoralizing, course altering, and so on.
