4.53) due to his plan to murder King Duncan. The eruption of Macbeth's most wanted desire causes him to lose control over his morality and personal discipline as his id suppresses his control over his decisions in life. The supremacy of Macbeth's id over other psychic zones leads him to continuously destroy innocent individuals' lives, just like Macduff's wife and children in which Macbeth states that "from this moment the very firstling of [his] heart shall be the firstlings of [his] hands " (4.1. 52-54). With no pity to give the innocent individuals he shall approach the opportunity and act immediately without considering if it will do good or bad to his own existence. Therefore, he becomes attached to his id as he foolishly believes in the witches' prophecy that "[he] shall never [vanquished] be until Great Birnam Wood to high Dunsinane hill shall come against him " (4.1.96-98); this triggers his mindset that makes him execute more people and leads him to a fatal downfall. .
The other psychic zone is the ego. The ego is the reality and it is a part of the mind that is equally-balanced; both in the conscious and unconscious part of an individual's mind. Its purpose is to "determine when, where, and how the id's demands might best be gratified in ways that are acceptable for the well-being of the individual within the culture " (Freud, 5). Macbeth's ambitions and desires that are controlled by the id cannot be completely met without the help of his ego. Since "the ego and the id work harmoniously together " (Freud, 5), he states his ego as a thought of murder and "[his] thought, whose murder is fantastical " (1.3.142) turns him into a completely different individual. His ambition of getting the throne and power causes him to ask himself if "a dagger of the mind " (2.1.39) is just the mind's way of giving him signs to do the evil deeds or just a hallucination of his that is done by his confused mind.