Act I Scene I/II
It becomes immediately apparent that Shakespeare wants to expose how much evil there is in the world over the course of this play. Apart from the witches in Act I Scene I, the audience is presented with two treacherous noblemen, an opportunistic rival king, and a bloodthirsty, ruthless and merciless general in Macbeth. From the very beginning, the play is gory and blood-soaked.
Act I Scene III
An obvious representation of evil in this scene is the presence of the witches and their eerie, evil powers. These unnatural creatures seem to have no problem with the unprovoked murder of swine, the picking of fights with innocent women, or the unrequired torment of sailors who have done nothing to harm the witches. Along with the witches’ unreasonable tormenting of good people comes their supernatural knowledge of affairs, and its dangerous effects on the people it becomes apparent to.