The motif of sleep in the play becomes synonymous with the loss of innocence. As Macbeth grapples with guilt, he declares he "sleeps no more," echoing Lady Macbeth's somnambulant state.Intriguingly, Banquo retains the capacity to sleep but acknowledges his ability to "dream." This contrast illuminates Banquo's preservation of innocence, as he truthfully admits to being captivated by the supernatural without succumbing to guilt-induced insomnia like Macbeth and Lady Macbeth.