Returning to his guests, Macbeth goes to sit at the head of the royal table but finds Banquo’s ghost sitting in his chair. Horror-struck, Macbeth speaks to the ghost, which is invisible to the rest of the company. Lady Macbeth makes excuses for her husband, saying that he occasionally has such “visions” and that the guests should simply ignore his behaviour. Then she speaks to Macbeth, questioning his manhood and urging him to snap out of his trance. The ghost disappears, and Macbeth recovers, telling his company: “I have a strange infirmity which is nothing / To those that know me”. As he offers a toast to company, however, Banquo’s spectre reappears and shocks Macbeth into further reckless outbursts. Continuing to make excuses for her husband, Lady Macbeth sends the alarmed guests out of the room as the ghost vanishes again.
Macbeth mutters that “blood will have blood” and tells Lady Macbeth that he has heard from a servant-spy that Macduff intends to keep away from court, behaviour that verges on treason . He says that he will visit the witches again tomorrow in the hopes of learning more about the future and about who may be plotting against him. He resolves to do whatever is necessary to keep his throne, declaring: “I am in blood / Stepped in so far that, should I wade no more, / Returning were as tedious as go o’er”. Lady Macbeth says that he needs sleep, and they retire to their bed.
The banquet is simultaneously the high point of Macbeth’s reign and the beginning of his downfall. Macbeth’s bizarre behaviour puzzles and disturbs his subjects, confirming their impression that he is mentally troubled. Despite the tentativeness and guilt she displayed in the previous scene, Lady Macbeth here appears surefooted and stronger than her husband, but even her attempts to explain away her husband’s “hallucination” are ineffective when paired with the evidence of his behaviour. The contrast between this scene and the one in which Duncan’s body was discovered is striking—whereas Macbeth was once cold-blooded and surefooted, he now allows his anxieties and visions to get the best of him.
Macbeth, of course, is thick with supernatural events and characters, so there is no reason to discount the possibility that a ghost actually stalks the halls. Some of the apparitions that appear in the play, such as the floating dagger in Act 2, scene 1, and the unwashable blood that Lady Macbeth perceives on her hands in Act 4, appear to be more psychological than supernatural in origin, but even this is uncertain. These recurring apparitions or hallucinations reflect the sense of metaphysical dread that consumes the royal couple as they feel the fateful force of their deeds coming back to haunt them.
Given the role that Banquo’s character plays in Macbeth, it is appropriate that he and not Duncan should haunt Macbeth. Like Macbeth, Banquo heard the witches’ prophecies and entertained ambitions. But, unlike Macbeth, Banquo took no criminal action. His actions stand as a rebuke to Macbeth’s behaviour and represent a path not taken, one in which ambition need not beget bloodshed.
