"Be innocent of the knowledge, dearest chuck, Till thou applaud the deed."
Then his imagination, excited by the dire policy which he premeditates, shudders into language that recalls to us her own when she unsexed herself to make a man of him: it is his turn to be demonized, and she simply marvels at his words.
So she goes to the feast where Banquo is expected, without his ghost in her heart: not a hint reaches her of what has happened. It is plain that she misconstrues the distracted behavior of Macbeth; and when he says, "If I stand here, I saw him," she could only suppose that it was the ghost of Duncan which was the painting of his fear: so that she bravely carries Macbeth through the brunt of the guests' wonder, and passes to that night's tormented sleep without a fresh spectre in its train. For Macbeth was either too dispirited or too considerate to tell her; so he lets the news wait till another day divulges it.
When the guests have departed, Macbeth is still absorbed by the terrifying possibilities of disclosure that were suggested by the apparition. Banquo, who can so easily become visible, may hint the manner of his death to somebody, to any thing, making the dumbest object voluble with it,--may even make a stone move to hit the murderer, or a tree's branch point speakingly to him, "the secretest man of blood." But his wife says nothing either to refute the fear or to make him ashamed of it. What palsy has been laid upon that ruffling tongue? It is not silent, as some critics fancy, because her love sets in to pity and to spare him; nor silent because the exigency has passed away, nor because Middleton struck out some speech of hers,--but silent simply from exhaustion. See, between the lines of Macbeth's mood, how the overtaxed woman droops, utterly frayed away, although the guests relieve her by departure. Exhaustion so preoccupies her that love itself is too faint to pity or to cheer, and her only thought is to get to bed. She has begun to feel the drift of a hopeless future, against which she has no strength, by contending, to regain the old mooring-ground where they cut loose and allowed an unseen current to clutch the slim bark. Neither curiosity nor self-interest can rouse her when Macbeth mentions that he has strange things in head which he means to carry to performance.