Act 2, Scene 2 of Macbeth is the dramatic heart of the play’s central crime—the murder of King Duncan. The scene opens with Lady Macbeth alone on stage, nerves electrified by anticipation. She has drugged the king’s grooms into a heavy sleep and laid their daggers ready for her husband. Despite her outward boldness, she reveals a flicker of vulnerability: she could not kill Duncan herself because the sleeping king resembled her father. This single admission cracks the armor of her ruthless persona and foreshadows the guilt that will eventually destroy her.
Macbeth enters carrying the bloodied daggers—a catastrophic mistake. He is shattered by what he has done. In a series of fragmented, halting exchanges, he tells Lady Macbeth that he heard voices in the adjoining chambers. Two sleepers woke briefly; one cried “God bless us!” and the other answered “Amen.” Macbeth found himself unable to say “Amen” in return, a detail that terrifies him because it signals his spiritual damnation. He then describes hearing a disembodied voice cry, “Sleep no more! Macbeth does murder sleep.” The voice named all three of his titles—Glamis, Cawdor, Macbeth—pronouncing that none of them shall ever sleep again.
Shakespeare’s famous apostrophe to sleep—“the innocent sleep, / Sleep that knits up the ravel’d sleave of care”—elevates the passage into poetry that transcends the plot. Sleep becomes a metaphor for innocence, peace, and the natural order that Macbeth has permanently violated. The speech is among the most quoted in all of Shakespeare’s works and establishes the insomnia motif that will haunt Macbeth for the rest of the play.
Lady Macbeth, still pragmatic, scolds her husband for his paralysis. She notices the daggers and is furious: they should have been left beside the drugged grooms to frame them for the murder. When Macbeth refuses to return to Duncan’s chamber—“I am afraid to think what I have done; / Look on’t again I dare not”—she seizes the daggers herself, calling him “infirm of purpose.” She declares that “the sleeping and the dead are but as pictures” and exits to smear the grooms’ faces with Duncan’s blood.
Left alone, Macbeth hears a persistent knocking at the castle gate. Every sound appalls him. He stares at his hands and delivers the scene’s most iconic lines: “Will all great Neptune’s ocean wash this blood / Clean from my hand? No, this my hand will rather / The multitudinous seas incarnadine, / Making the green one red.” The image inverts the normal relationship between hand and ocean—rather than the sea cleaning his guilt, his guilt would stain the entire sea red. Lady Macbeth returns, her own hands now bloody, and dismisses his anguish: “A little water clears us of this deed.” This confident declaration will echo with devastating irony in Act 5, when she sleepwalks and obsessively washes imaginary bloodstains from her hands.
The relentless knocking at the gate—which will continue into the famous Porter scene—serves as the outside world intruding on the Macbeths’ private horror. Lady Macbeth urges them to put on their nightgowns and retire to bed so they will not appear to have been awake. Macbeth’s final line, “Wake Duncan with thy knocking! I would thou couldst!” reveals his instant, devastating regret. The scene leaves both characters irrevocably changed: Macbeth consumed by guilt, and Lady Macbeth forced into the role of stage manager for a crime whose psychological toll she has fatally underestimated.