The Murder and Its Aftermath
The volta (turning point) comes when the speaker realises "Porphyria worshipped me." This moment of power shifts the entire dynamic. His calm, methodical description of strangling her with her own hair is genuinely shocking - notice how he repeats "No pain felt she" to justify his actions.
After the murder, he treats her corpse like a doll, positioning her head on his shoulder in a twisted parody of intimacy. The dramatic irony is devastating - he believes he's given her what she wanted (to be together forever) but has completely misunderstood love.
The final line is crucial: "And yet God has not said a word!" The speaker interprets God's silence as approval, showing his complete detachment from reality. He's been sitting with her corpse all night as he tells this story.
Victorian Context: The title references porphyria, a disease that could cause madness, linking mental illness with obsessive love.
Browning uses this dramatic monologue to expose how possession can masquerade as love, creating one of literature's most disturbing portraits of psychological obsession.