Whatever the nature of the witches’ prophecies, their sheer inscrutability is as important as any reading of their motivations and natures. The witches stand outside the limits of human comprehension. They seem to represent the part of human beings in which ambition and sin originate—an incomprehensible and unconscious part of the human psyche. In this sense, they almost seem to belong to a Christian framework, as supernatural embodiments of the Christian concept of original sin. Indeed, many critics have argued that Macbeth, a remarkably simple story of temptation, fall, and retribution, is the most explicitly Christian of Shakespeare’s great tragedies. If so, however, it is a dark Christianity, one more concerned with the bloody consequences of sin than with grace or divine love. Perhaps it would be better to say that Macbeth is the most orderly and just of the tragedies, insofar as evil deeds lead first to psychological torment and then to destruction. The nihilism of King Lear, in which the very idea of divine justice seems laughable, is absent in Macbeth—divine justice, whether Christian or not, is a palpable force hounding Macbeth toward his inevitable end.

Macduff seems suspicious of these new deaths, which Macbeth explains by saying that his fury at Duncan’s death was so powerful that he could not restrain himself. Lady Macbeth suddenly faints, and both Macduff and Banquo call for someone to attend to her. Malcolm and Donalbain whisper to each other that they are not safe, since whoever killed their father will probably try to kill them next. Lady Macbeth is taken away, while Banquo and Macbeth rally the lords to meet and discuss the murder. Duncan’s sons resolve to flee the court. Malcolm declares that he will go south to England, and Donalbain will hasten to Ireland.