" But, even though she seems to be cruel and ambitious from the start, she is innately good, as she calls upon "spirits" to "unsex" her now, unsex as in turn her into a man almost, as cruelty was linked with masculinity. She continues to invoke these spirits, "come to my women's breasts and take my milk for gall, you murd"ring ministers, Wherever in your sightless substances you wait on nature's mischief," until she believes herself to be cruel enough to carry out her plans to make Macbeth king. Overall, our initial impression of her is that of an ambitious power hungry woman, who must drain herself of her innate goodness to attain her goal. In the following scenes we see her interaction with her husband, and most importantly Duncan.
When we first see Lady Macbeth speak to her husband, she defiantly says "You shall put this night's great service into my dispatch," while Macbeth can only hesitantly refuse to speak of it further, possibly shocked by his wife's tenacity and strength. She even gives advice to shocked Macbeth, telling him to "Look like th" innocent flower, but be th" serpent under it," implying that Macbeth is still far too kind to carry out such a deed. Their conversation ends there for now and we see Lady Macbeth, and not Macbeth himself, greeting Duncan. Here Lady Macbeth butters up Duncan, brown-nosing him and the like, "Your majesty unloads our house." Most importantly though is that Lady Macbeth greets Duncan and not Macbeth. Here we see Lady Macbeth's intelligent and plotting sides. She fears that Macbeth's face is "as a book" and Duncan will surely suspect something since Macbeth will dissemble before him. So even from the start, Lady Macbeth carefully plots Duncan's murder. However, when the time comes to murder Duncan, she admits that she would have murdered him rather than have Macbeth do it, if "had he not resembled my father," which shows that those spirits have not entirely filled her with cruelty from toe to crown and that she is still conscientious of her actions.
