- The narrator begins as a loving and gentle person, deeply attached to his pets.
- His descent into madness is depicted through his deteriorating mental state.
- The narrator's increasing acts of cruelty towards his pets signify his psychological decline.
- Alcohol consumption exacerbates his violent tendencies.
- The narrator's transformation is marked by his escalating abuse towards his beloved black cat, Pluto.
- The brutal murder of Pluto is a manifestation of his inner turmoil and moral decay.
- The narrator's guilt and paranoia intensify after the murder.
- He confesses his crime by revealing the cat's corpse hidden within the walls of his house.
- The psychological descent portrayed in "The Black Cat" explores the human capacity for evil and the destructive power of guilt and remorse.