Act 1 Scene 3

Macbeth and Banquo step aside to discuss this news; Banquo is of the opinion that the title of Thane of Cawdor might "enkindle" Macbeth to seek the crown as well (119). Macbeth questions why such happy news causes his "seated heart [to] knock at [his] ribs / Against the use of nature," and his thoughts turn immediately and with terror to murdering the king in order to fulfill the witches' second prophesy (135-36). Banquo is weary of trusting any witches regardless of the "good news" they might bring.