In "Twilight" by Stephenie Meyer, the narrator reflects on their choices and the inevitability of facing consequences. The quote, "I decided as long as I'm going to hell, I might as well do it thoroughly," captures a sense of resignation mixed with determination. It suggests that if one is to embark on a path filled with danger and moral dilemmas, they might as well embrace it fully rather than hesitate or hold back.

This statement underscores a theme of rebellion against societal norms and the acceptance of darker impulses. It reveals the character's willingness to explore the depths of their experiences, even if it leads them to troubling places. The idea of thoroughly embracing one's fate highlights the complexities of identity and the choices we make in pursuit of love, adventure, and self-discovery.