I could not bring myself to disclose a secret which would fill my hearer with consternation and make fear and unnatural horror the inmates of his breast.
Chapter 22 · Narrator
Context
Victor explains why he cannot tell his father about the Creature, fearing both that he would be thought mad and that the truth would traumatize his listener.
Analysis
Victor personifies "fear and unnatural horror" as "inmates" who would take up permanent residence in his father's mind, as if emotions were prisoners locked inside a body. This turn of phrase reveals how Victor thinks about psychological harm—as a kind of contamination or invasion that, once introduced, cannot be removed. It justifies his silence by imagining disclosure as an act of violence in itself, making his secrecy seem protective rather than self-serving.
Essay Tip
Use this to argue that Victor consistently reimagines his choices as acts of protection—here, he frames silence as shielding his father from permanent psychological damage, when it primarily shields Victor himself from having to face his father's judgment.