In Edgar Allan Poe's "The Black Cat," the narrator asserts his sanity while recounting a dark tale filled with horror and guilt. He emphasizes that he is fully aware of his actions, despite the madness that has overtaken him. This statement sets the tone for the exploration of his disturbed psyche, reflecting the tension between sanity and insanity. Poe skillfully delves into themes of guilt, the consequences of one's actions, and the fine line between reality and madness.

The quote captures the narrator's desperate denial of his own mental deterioration. His insistence on being "not mad" highlights his struggle to reconcile his horrific deeds with his self-perception. As the narrative unfolds, it becomes evident that his attempts to convince the reader—and perhaps himself—of his sanity serve only to deepen the unsettling atmosphere. Ultimately, the story serves as a poignant exploration of the darker aspects of human nature and the terrifying descent into madness.