"Come, you Spirits / That tend on mortal thoughts, unsex me here"
Act 1, Scene 7
Lady Macbeth asks the spirits to take away her femininity and make her as ruthless as a man, so she can commit regicide.
"I dare do all that may become a woman."
Act 1, Scene 7
Lady Macbeth claims she is willing to do whatever is necessary, implying she is willing to commit murder to achieve her goals.
"Out, damned spot! Out, I say! One; two; why, / Then 'tis time to do't. – Hell is murky! Fie, my lord, fie! / A soldier, and afeard? What need we fear / Who knows it, when none can call our power to account?"
Act 2, Scene 2
Lady Macbeth is haunted by the guilt of her actions and is trying to convince herself that she has nothing to fear, as she and Macbeth are above the law.
"What's done cannot be undone. / Things without all remedy / Should be without regard: what's done were better / Left undone."
Act 3, Scene 2
Lady Macbeth regrets her actions and realizes that once something is done, it cannot be undone. She wishes she had left things as they were before.
"Out, damned spot! / Out, I say!"
Act 5, Scene 1
Lady Macbeth is still haunted by the guilt of her actions, and the spot or stain on her hand represents the blood of the murdered King Duncan.
"Here's the smell of the blood still: all the perfumes of Arabia will not sweeten this little hand. Oh, oh, oh!"
Act 5, Scene 1
Lady Macbeth is tormented by the memory of the blood on her hands, symbolizing the guilt and shame she feels.