Act III, Scene 1 of Macbeth marks a decisive turning point in the play, as Macbeth shifts from a guilt-ridden killer into a calculating tyrant who orders murder without the tormented hesitation that preceded Duncan's assassination. The scene opens at the royal palace in Forres, where Banquo delivers a revealing soliloquy. He reflects that all three of the Weird Sisters' predictions for Macbeth—Thane of Glamis, Thane of Cawdor, and King—have now come true, and he suspects foul play: "Thou play'dst most foully for't." Yet Banquo also recalls the witches' prophecy that his descendants will inherit the throne, and he allows himself a flicker of ambition: "May they not be my oracles as well / And set me up in hope?"
When Macbeth and Lady Macbeth enter as the newly crowned King and Queen, the court appears serene. Macbeth warmly invites Banquo to a solemn banquet that evening, but beneath the gracious language he is carefully interrogating his friend. He learns that Banquo plans to ride that afternoon with his son Fleance and will return by nightfall. "Fail not our feast," Macbeth says—a line loaded with dramatic irony, since he is already planning to ensure Banquo never arrives.
Once the court departs, Macbeth delivers one of the play's most psychologically complex soliloquies. "To be thus is nothing, / But to be safely thus," he declares, articulating the central anxiety that now governs his life: the crown is worthless if it can be taken away. He fears Banquo's "royalty of nature," his courage, and his wisdom. Worse, the witches placed "a fruitless crown" on Macbeth's head and "a barren sceptre" in his hand, meaning he has no heir. If the prophecy holds, Macbeth has murdered Duncan and damned his own soul—his "eternal jewel"—only to make Banquo's children kings. He refuses to accept this fate, challenging destiny itself: "Come, Fate, into the list, / And champion me to the utterance!"
Macbeth then meets with two hired murderers whom he has already primed in a previous conversation. In a masterful display of manipulation, he convinces them that Banquo is responsible for their misfortunes and questions their manhood—the same tactic Lady Macbeth once used on him. He tells the murderers they must also kill Fleance, whose "absence is no less material" to his security. The scene closes with a chilling couplet: "It is concluded: Banquo, thy soul's flight, / If it find heaven, must find it out tonight." Macbeth now acts with cold resolve, no longer needing his wife's prodding—a transformation that signals the accelerating moral collapse at the heart of Shakespeare's tragedy.