One of the ways that anger is used involves when Lady Macbeth expresses her ferocity, anger, and most importantly, mercilessness. This is shown in one of the quotes; "How tender 'tis to love the babe that milks me./ I would, while it was smiling in my face,/ Have pluck'd my nipple from his boneless gums/ And dash'd the brains out.” [ Act I, Scene vii, Lines 63-66 ] This quote is one of the multiple moments in the play when Lady Macbeth shows her evolution from being a nice, reserved lady to a brutal conspirator with concern for only herself and her husband, destroying anything in her way, even a helpless baby. "Give me the daggers. The sleeping and the dead/ Are but as pictures." [Act II, Scene II, Lines 69-70] She shows this by using vivid detail and disturbing images in this quote. A couple of the ways that Lady Macbeth uses mercilessness in this play include when she devises a plan to kill Duncan and contributes to the murder of Banquo. These two murders are excellent examples of Lady Macbeth's change given that her victims are two people that used to be very close with them but are eventually betrayed and killed. Milk and babies are being drained from Lady Macbeth continually, as showed from the assassination of Duncan.
Another of the important themes in this play is pity. Pity is commonly used in lines throughout the play and is important in showing that Lady Macbeth is cruel to all, even the most helpless. Babies are used, and are referred to as being abused and killed, connecting to the killing of pity. Shakespeare uses the idea of the helplessness of a baby, "And pity, like a naked new-born babe.” [ Act I, Scene vii, Line XXI] These two main images together describe the transformation of the Macbeth’s. This alteration is vital in describing how they will later become evil and only out for themselves. The image of bashing a baby's brains out indicates how they will be merciless to even the most pitiful of beings. Although the Macbeth’s try to carry this mindset everywhere they travel, thoughts of doubt and guilt also sweep through their minds. It seems as if the transformation they are trying to make may be too much for them, for they are continually looking back into the past at the murder.
The third important theme in this play is milk. This theme is commonly referred to in the play and has various meanings and symbols that help to hint at Lady Macbeth's change and eventual downfall. Milk symbolizes "happiness" and "innocence" in Lady Macbeth and is slowly drained throughout the course of the play. The reason that milk is used to show kindness is because it is used for a mother to feed a baby. These two ideas of milk and pity are connected because of this. Lady Macbeth is clearly aware of this throughout the play, and there are many occasions where she acknowledges it. "Glamis thou art, and Cawdor; and shalt be/What thou art promised: yet do I fear thy nature; It is too full o' the milk of human kindness/To catch the nearest way: thou wouldst be great;/ Art not without ambition.” [Act I, Scene v, Lines XV- XIX] This quote does a great job of describing Lady Macbeth's main vision, which is that without draining that milk, that innocence, nothing good will happen for her or her husband. This is also shown in the quote, “Fair is foul, and foul is fair.” [ Act I, scene i, Line XII]
These three images help to portray the emotional transition of the Macbeth’s and describe how they want to become in order to achieve their goals and work towards their ambitions. In this case, one of the main examples was the assassination of Duncan. Macbeth was forced to murder Duncan given that Macbeth was not the heir to the throne. If Duncan had died naturally, Malcolm would have taken over. However, due to the fear of assassination in addition to the fact that his father had just died, Malcolm stepped away from the throne, and the Macbeth’s took advantage. After the Macbeth’s successfully became king and queen, Lady Macbeth tried to continue her mental progression to a new state; the murder held her back, and she eventually became so guilty that she killed herself.