Banquo's reaction to this peculiar prophecy is understandable rather than an example of professional rivalry. He has been linked in name with Macbeth and, so far, enjoys equal merit with his friend. Why should he not also have his future predicted? But the Witches' answer to him is more riddling: "lesser . . . and greater," "not so happy . . . much happier," "get kings . . . be none" all suggest a more unpredictable future.
Noteworthy in this scene is the way in which Shakespeare registers the psychological response of both Macbeth and Banquo. The questions "Whither . . . ?", "Were . . . ?", "Have we . . . ?" and so on paint a picture of shared incomprehension. Shakespeare cleverly combines Macbeth's and Banquo's confusion at the Witches' vanishing with their disbelief at what has been spoken. The reference to "the insane root that takes the reason prisoner" suggests the working of a powerful drug, and the clear impression is that they feel they have been dreaming.
Ross arrives and announces that Macbeth is to be the new Thane of Cawdor, thus confirming the first prophecy of the Witches. Banquo and Macbeth are struck dumb for the second time, but now Shakespeare contrasts their responses. Banquo is aware of the possibility that the prophecies may have been the work of supernatural dark forces, as exemplified in his lines "What? Can the Devil speak true?" (108) and "oftentimes, to win us to our harm, / The instruments of Darkness tell us truths . . . — (only) to betray us" (123–125). Macbeth is more ambiguous. His speech is full of what will now become his trademark — questioning, doubting, weighing up, and seeking to justify: "This supernatural soliciting / Cannot be ill; cannot be good" (130–131).
