The voice tells Macbeth that he will never sleep peacefully again because he has committed murder. It also hints that Macbeth's actions will come back to haunt him in the future.
He is already guilty enough from killing Duncan and doesn't want to have more guilt by killing his friend Banquo. he think that the murderers would tell others that macbeth is the one who kill people
The witches don't make Macbeth perform any dark acts, such as killing King Duncan; they just put the idea in his head. The witches tell Macbeth he is the Thane of Cawdor (which he doesn't know yet) and also tell him that he will be king. Once Macbeth finds out he is in fact the Thane of Cawdor, he begins to believe the witches' prophecies. Lady Macbeth convinces him that the only way Macbeth can be king is by killing King Duncan, and he does so. The witches' role in making Macbeth a tragic hero is to serve a catalyst for Macbeth's dark thoughts.
Banquo probably doen't know for sure about how Macbeth is planning on killing Duncan so he can become king. Even if Banquo did know, he is a very loyal friend to Macbeth and will keep all of his suspicions to himself. Which is ironic, because Mabeth ends up hiring murderers to kill Banquo, which goes to show you that Macbeth really isn't that loyal.
There are choices in Macbeth which he cannot escape e.g when Macbeth reveals the truth to Macduff about killing his wife and son. He gets frightened from Macduff and tell him the truth. He also begins to get worried after the murdering of Duncan.
She rings a bell. Macbeth says, "the bell invites me. Hear it not Duncan for it is a knell that summons thee to heaven or to hell."
To become kind and queen. In the beginning of the play, 3 witches tell Macbeth that he will be kind. To cut it really short, his ambition is driving him to become a kind by any means.
Macbeth avoids using the words murder or kill because he is in denial and feels guilty about his plan to kill Duncan. He is suppressing his conscience and trying to rationalize his actions by using euphemisms. This reluctance to face the reality of his plan shows that Macbeth's state of mind is conflicted and troubled.
Lady Macbeth tells Macbeth to hide his emotions and actions.
Macbeth tells Lady Macbeth that he has decided not to go through with the plan to kill King Duncan.
Lady Macbeth urges Macbeth to seize the opportunity to kill King Duncan in order to fulfill their ambition of becoming royalty. She questions his masculinity and manipulates him into thinking that it is the only way to achieve power. Her persuasion pushes Macbeth to commit the murder.
Macbeth was consumed by his ambition and desire for power, leading him to prioritize his own goals over his moral conscience. He was influenced by Lady Macbeth and ultimately convinced himself that the benefits of committing the murder outweighed the voice of his conscience.
Lady Macbeth places the bloody daggers near the alleged murderers in Macbeth to frame them for King Duncan's murder.