"Stay you imperfect speakers, tell me more" Act I, scene 3, line 71

In this quotation Macbeth and Banquo are riding when they came upon three witches. The witches tell Macbeth that he will become king and that Banquo will be the father of kings. As Macbeth hears this he wants to learn more. He cant fathern the idea of him becoming king because he was not the next in line. As the witches tell him he realizes that he must kill king Duncan in order to become king. In this point of the play Macbeth is not yet serious about killing Duncan, but yet he is toying with the idea.