One can start by taking small risks. For example, speaking up in a meeting when you usually don't. This shows guts. If it leads to a positive outcome like getting a new project, that's success and it becomes a story.
In the pursuit of any goal, whether it's in business, sports, or personal development, 'no guts no glory no success no story' holds true. Courage is the fuel that drives us to take the first step towards glory. Glory here can be seen as recognition or a high - achieving state. Success is the result of that pursuit. For instance, in the world of sports, an athlete needs the guts to train hard, compete against tough opponents. If they succeed in winning championships or achieving personal bests, that's success. And this success then becomes a story that can inspire others. Without that initial courage, none of these things would happen.
Guts is purely fictional. It's a concept or character that exists within the realm of imagination and creative storytelling rather than being based on reality.
Perhaps in this fanfic, Griffith has turned into something truly evil and a threat to the world Guts cares about. Guts, being the warrior he is, might feel it's his duty to put an end to Griffith to save others. Also, Guts could be driven by his own sense of justice. If Griffith has wronged innocent people, Guts may decide that killing him is the only way to set things right.