In act 1:6 and 7, Macbeth is battling with his conscience and is very confused. He does not want to kill his king because he is afraid of what may happen to him as a consequence. “If th’ assassination could trammel up the consequence”
At the beginning of 1:7 he talks to himself and considers the points for and against killing the king. Just as he has talked himself out of the murder his wife arrives, possessed by evil spirits “pour thy spirits in mine ear” to bring her husband back to the dark side. “I have no spur to prick the sides of my intent but only vaulting ambition which o’erleaps itself and falls on th’ other – Enter Lady Macbeth“ L