Read the selection below from the short story "The Pit and the Pendulum" by Edgar Allan Poe and answer the question that follows.
I saw clearly the doom which had been prepared for me, and congratulated myself upon the timely accident by which
had escaped. Another step before my fall, and the world had seen me no more and the death just avoided was of that
very character which I had regarded as fabulous and frivolous in the tales respecting the Inquisition. To the victims of
its tyranny, there was the choice of death with its direst physical agonies, or death with its most hideous moral horrors.
I had been reserved for the latter. By long suffering my nerves had been unstrung, until I trembled at the sound of my
own voice, and had become in every respect a fitting subject for the species of torture which awaited me.
How does Poe portray the madness of the narrator in the passage above?