If is Macbeth's ambition that defeated his good nature, and that pushed him to break all moral boundaries. Before his encounter with the three witches (Act I, Scene III), Macbeth was a loyal man. He was loyal to his King, to his wife, and to his friends. Despite his loyalty, there is evidence in the play that shows Macbeth thought or dreamt of becoming King before he met the witches. This evidence is supported by human nature: if Macbeth had not wanted to become King, the witches' predictions would not have had an effect on him. The witches were able to manipulate Macbeth by turning his secret ambition (his want to become King) into a horrible reality. Macbeth was initially led to evil by the witches' predictions. Once he heard them predict that he was to become King, "All hail, Macbeth! that shalt be king hereafter!" (I.3.52), he did not want to wait any longer. In Macbeth's letter to his wife, he tells her of the witches prophecies. Again, if Macbeth had no intention of acting upon this information.