The theme absolute power corrupts absolutely first emerges when the three witches tell Macbeth and Banquo their prophecies. They don't know if they should believe the witches but if the prophecies come true they will have absolute power.
The theme really starts to develop when lady Macbeth receives the letter from her husband. She believes that the king at that moment had to die in order for Macbeth to become king. Thinking about all of the things that come with with kingship Macbeth's wife says that she will do whatever it take to help him succeed.
Another important part is when Macbeth is getting ready to murder the king out of nowhere a floating dagger appears before him. Macbeth starts to go crazy thinking about what he has to do even though he is a good person and doesn't want to kill the king
The tone that i am using for the beginning of the text is darkness and evil. Lady Macbeth says "unsex me here" which means she did not want any motherly or loving instincts anymore . The reason in doing so is because she was not very sure if Macbeth was up to the task at hand and she would kill the king if she had to.
What is that noise? Seyton. It is the cry of women, my good lord Macbeth. I have almost forgotten the taste of fears. I have supped full with horrors. This is figurative language and is basically saying that Macbeth has seen and done so many horrible things that he has now become familiar of it and it no longer affects him.
In the end Macduff kills and beheads Macbeth ending his rule as king. Since the beginning of his kingship Macbeth made himself look bad and unready to rule as king people saw this and didn't want him as king some fled while others sided with the other army that was going to take over Macbeth's kingdom. Some people accused Macbeth of killing the king because of this Macbeth killed every person who made the accusation.