First, Macbeth's insecurity is shown in his use of words such as "scotch'd" (15), "fear, and sleep" (19), "terrible dreams" (20), and "lives" (41). Macbeth's diction reveals that he is aware that he has only temporarily solved his problems as he knows that his kingship is not secure with Banquo and Fleance alive. Macbeth also reveals that he is living in fear, with guilt tormenting him and terrible dreams bothering him in his sleep. Throughout the play, sleep is Macbeth's nemesis and retributive justice for the murder of King Duncan. Second, Macbeth's resolve is revealed through his use of words such as "comfort" (43), "assailable"[,] "done" (47), and "deed" (51) . At this point, Macbeth is more at ease when he knows that Banquo and Fleance are vulnerable. He has come to a conclusion, and is determined to have them killed. Third, Lady Macbeth's weariness can be revealed in her use of words such as "doubtful" (9), "alone" (10), and "without content"[.] Lady Macbeth is unhappy even after she's achieved her desires. After the murder of Duncan, Macbeth has become independent, leaving Lady Macbeth alone to herself. Even after this, Lady Macbeth still makes pitiful attempts to reach out to Macbeth and fails to rekindle the relationship they once had. The couple has grown apart from each other, leaving Lady Macbeth without any ability to influence Macbeth as she once did. Therefore, diction reveals Macbeth's insecurity and resolve, as well as a weary Lady Macbeth.
Likewise, Lady Macbeth's weariness and Macbeth's insecurity is brought out by rhetorical devices. First, Lady Macbeth says the following rhetorical statements: "Nought's had, all's spent" (6), and "what's done is done" (14). Lady Macbeth says that nothing has been gained while she and Macbeth have lost everything.