What are the passages that highlight macbeth's growing ambitions?
In Act 1.5 Macbeth says as an aside “Stars, hide your fires; / let not light see my black and deep desires” (28-29), using the imagery of light and dark that operates throughout the play to signify that he knows his ambitions are evil. He says this right after Duncan says, “From hence to Inverness,” meaning they are about to go to Macbeth’s castle. Even earlier, after hearing the witches’ predictions, he shows interest, demonstrating his ambitions: “why do I yield to that suggestion whose horrid image doth unfix my hair?” (1.3. 147-48). In the space of two scenes, Macbeth’s ambition changes from the more vague “why do I yield,” which is a question, to the more specific “Stars, hide your fires,” which is a more aggressive command, indication already his initial ambitions to murder Duncan have increased significantly.
In Act I, scene 5, Macbeth and Lady Macbeth discuss his ambition to be king and begin plotting the murder of Duncan.
In Act III, scene 1, Macbeth hires killers to murder Banquo and Fleance.
In Act IV., scene 1 Macbeth demands that the witches tell him more of the future in his drive to take care of any adversaries.