Regicide

In act 1 scene 5 Lady Macbeth receives a letter from Macbeth about his title and how he can be next in throne if he kills king Duncan. Lady Macbeth turns to the evil spirits to make her in charge of that situation. Lady Macbeth feels like Macbeth doesn't have enough courage to kill King Duncan. "Come, you spirits that tend on mortal thoughts, unsex me here, and fill me from the crown to the toe top-full of direst cruelty." Lady Macbeth also asks the evil spirits to change her sex in order to become in charge. She says she wants thick blood. Back then men had thick blood and women had thin blood because they lose blood during puberty. 

Lady Macbeth is breaking natural order because she wants to become a man for evil reasons. "Come to my woman's breasts and take my milk for gall." It is thought that in this scene Lady Macbeth might be a witch. This is also another example of Lady Macbeth breaking natural order because of witch craft. Macbeth and Lady Macbeth are two faced. Their false words towards the King makes the king clueless on who they are. "Come, thick night, and pall thee in the dun nest smoke of hell, that my keen knife see not the wound it makes." Lady Macbeth hopes that no one knows of the planning of killing King Duncan. Macbeth said this early in scene 5. This is an example of false appearance because no one knows what they are going to do. In scene 5 the two themes breaking natural order and false appearance are commonly used.