A common type of mental illness is paranoia schizophrenia: an illness in which a person loses connection with reality. The most common symptoms of this disorder are violence, anxiety, hallucinations and delusions. Throughout the play, Macbeth demonstrated all of these characteristics. For example, he hallucinates more than once in the play: the floating dagger and the ghost of Banquo. As he approaches King Duncan's chamber, Macbeth speaks to himself: "Art thou not, fatal vision, sensitive / To feeling as to sight?" (Shakespeare 2.1.44-45) He believes there is a dagger floating before him, but the audience quickly realizes that he is just hallucinating. Macbeth suffers much mental agony; he is thinking about the witches' prophecies, the plot to murder the king, and his ambition to become king. We know this because he describes his suffering as “…a false creation/coming from the heat-oppressed brain?” (Shakespeare 2.1.46-47). Also, at the banquet, Macbeth sees the ghost of Banquo and trembles with fear. Even though no one knows about Banquo's murder, Macbeth reveals that it is not his fault: “You cannot say that I did it. Never shake / your bloody locks at me. "(Shakespeare 3.4.61-62). From these lines we could deduce that he suffers from hallucinations and cannot think effectively. Macbeth suffers from delusions; he believes that everyone is his enemy. For example, Macbeth feels anxiety towards Banquo : “To be thus is nothing, but to be safe thus. /Our fears at Banquo remain deep…” (Shakespeare 3.1.54-55). Banquo knows too much and the prophecies about Banquo will eventually come true, so he plots to kill him. He fears that Banquo's sons will become kings; therefore, his position as king will not remain for long. Furthermore, the second apparition mentioned that he is aware of Macduff, therefore