This want of imagination, though it helps to make Lady Macbeth strong for immediate action, is fatal to her. If she does not feel beforehand the cruelty of Duncan's murder, this is mainly because she hardly imagines the act, or at most imagines its outward show, 'the motion of a muscle this way or that.' Nor does she in the least foresee those inward consequences which reveal themselves immediately in her husband, and less quickly in herself. It is often said that she understands him well. Had she done so, she never would have urged him on. She knows that he is given to strange fancies; but, not realising what they spring from, she has no idea either that they may gain such power as to ruin the scheme, or that, while they mean present weakness, they mean also perception of the future. At one point in the murder scene the force of his imagination impresses her, and for a moment she is startled; a light threatens to break on her:
These deeds must not be thought
After these ways: so, it will make us mad,
she says, with a sudden and great seriousness. And when he goes panting on, 'Methought I heard a voice cry, "Sleep no more,"' ... she breaks in, 'What do you mean?' half-doubting whether this was not a real voice that he heard. Then, almost directly, she recovers herself, convinced of the vanity of his fancy. Nor does she understand herself any better than him. She never suspects that these deeds must be thought after these ways; that her facile realism,
A little water clears us of this deed,
will one day be answered by herself, 'Will these hands ne'er be clean?' or that the fatal commonplace, 'What's done is done,' will make way for her last despairing sentence, 'What's done cannot be undone.'
Hence the development of her character—perhaps it would be more strictly accurate to say, the change in her state of mind—is both inevitable, and the opposite of the development we traced in Macbeth. When the murder has been done, the discovery of its hideousness, first reflected in the faces of her guests, comes to Lady Macbeth with the shock of a sudden disclosure, and at once her nature begins to sink. The first intimation of the change is given when, in the scene of the discovery, she faints.[229] When next we see her, Queen of Scotland, the glory of her dream has faded. She enters, disillusioned, and weary with want of sleep: she has thrown away everything and gained nothing:
Nought's had, all's spent,
Where our desire is got without content:
'Tis safer to be that which we destroy
Than by destruction dwell in doubtful joy.
Henceforth she has no initiative: the stem of her being seems to be cut through. Her husband, physically the stronger, maddened by pangs he had foreseen, but still flaming with life, comes into the foreground, and she retires. Her will remains, and she does her best to help him; but he rarely needs her help. Her chief anxiety appears to be that he should not betray his misery. He plans the murder of Banquo without her knowledge (not in order to spare her, I think, for he never shows love of this quality, but merely because he does not need her now); and even when she is told vaguely of his intention she appears but little interested. In the sudden emergency of the banquet scene she makes a prodigious and magnificent effort; her strength, and with it her ascendancy, returns, and she saves her husband at least from an open disclosure. But after this she takes no part whatever in the action. We only know from her shuddering words in the sleep-walking scene, 'The Thane of Fife had a wife: where is she now?' that she has even learned of her husband's worst crime; and in all the horrors of his tyranny over Scotland she has, so far as we hear, no part. Disillusionment and despair prey upon her more and more. That she should seek any relief in speech, or should ask for sympathy, would seem to her mere weakness, and would be to Macbeth's defiant fury an irritation. Thinking of the change in him, we imagine the bond between them slackened, and Lady Macbeth left much alone. She sinks slowly downward. She cannot bear darkness, and has light by her continually: 'tis her command. At last her nature, not her will, gives way. The secrets of the past find vent in a disorder of sleep, the beginning perhaps of madness. What the doctor fears is clear. He reports to her husband no great physical mischief, but bids her attendant to remove from her all means by which she could harm herself, and to keep eyes on her constantly. It is in vain. Her death is announced by a cry from her women so sudden and direful that it would thrill her husband with horror if he were any longer capable of fear. In the last words of the play Malcolm tells us it is believed in the hostile army that she died by her own hand. And (not to speak of the indications just referred to) it is in accordance with her character that even in her weakest hour she should cut short by one determined stroke the agony of her life.
The sinking of Lady Macbeth's nature, and the marked change in her demeanour to her husband, are most strikingly shown in the conclusion of the banquet scene; and from this point pathos is mingled with awe. The guests are gone. She is completely exhausted, and answers Macbeth in listless, submissive words which seem to come with difficulty. How strange sounds the reply 'Did you send to him, sir?' to his imperious question about Macduff! And when he goes on, 'waxing desperate in imagination,' to speak of new deeds of blood, she seems to sicken at the thought, and there is a deep pathos in that answer which tells at once of her care for him and of the misery she herself has silently endured,
You lack the season of all natures, sleep.