The metaphor in Macbeth's soliloquy represents the internal turmoil and perpetual guilt he will face after murdering King Duncan, symbolizing the loss of innocence and the consequences of disrupting the natural order.
The metaphor Macbeth uses in his soliloquy at the beginning of act 1, scene 7, can be analyzed as an expression of the internal conflict and the consequences of his actions. When Macbeth hears a voice cry 'Sleep no more! Macbeth does murder sleep,' it signifies that Macbeth has disrupted the natural order by committing regicide. The metaphor of sleep represents both innocence and peace of mind, noting that Macbeth has murdered these concepts within himself.
The voice's repetition, 'Macbeth shall sleep no more,' emphasizes that Macbeth's guilt will leave him restless, solidifying the idea that his guilty conscience will torment him continuously. As a strong and dedicated warrior, he is haunted by the innocent sleep he has destroyed, which acts as the 'balm of hurt minds' and 'great nature's second course,' now lost to him due to his treacherous actions against King Duncan.
The probable question may be:
How does the metaphor of sleep in Macbeth's soliloquy reflect the internal conflict and consequences of his actions, particularly in relation to the loss of innocence and the disruption of the natural order?