The witches are introduced in to the play with a very powerful scene. The three witches talk of the time that they will meet with Macbeth. The rhythm breaks down when they mention Macbeth this is where the writer wants to show the reader that the meeting with Macbeth is important to the rest of the play. The tone and theme is set with one line 'fair is foul, and foul is fair' meaning that good is bad and bad is good. This line introduces evil into the play and at the same time tells the reader that not...
be the end of it 'a little water clears us of this deed'.

Macbeth know that what he has done is wrong and he regrets it after it has happened.

Lady Macbeth does not think about the task at the time and she just wants Macbeth to succeed, but after she has done it her guilt sets in. Macbeth acts under pressure to do what his wife wants but if she had not influenced him he wouldn't have killed the king. Lady Macbeth gets him to do what she can not bring her self to do.