Before committing the murder, Macbeth is still a good man and his conscience is stirring serious doubts. When contemplating the terrible deed, he is undecided, swaying back and forth. "Prithee, peace: I'll dare do all that may become a man, who dares more is none-. But encouragement from his wife and the prophecy from the witches are enough to convince Macbeth to kill the King in cold blood. The witches' prophecies and provokings influence Macbeth to change. Their first meeting is a good example of how the three sisters make Macbeth seem very gullible. "Stay you imperfect speakers, tell me more-. The prophecy gives Macbeth a false sense of security and inevitability. The weakness of his mind becomes more evident as Macbeth transforms into a power hungry monster that kills everyone that poses the slightest threat. The quote "Stars' hide your fires let not light see my back and deep desires- shows Macbeth begging to be able to get thru these treacherous acts. Lady Macbeth is also turned evil by ambition and power. At the beginning of the play, Lady Macbeth is also loyal and much respected. When she hears the prophecy, she feels that she also deserves the power and prestige. The lust for power drives her to push and encourage Macbeth to kill Duncan. Acting as the instigator and motivator, Lady Macbeth questions and provokes Macbeth's abilities and desires: "Wherein you dress'd yourself? Hath it slept since? And wakes it now, to look so green and pale At what it did so freely? From this time Such I account thy love. Art thou afeard To be the same in thine own act and valour As thou art in desire? Wouldst thou have that Which thou esteem'st the ornament of life, And live a coward in thine own esteem,"" (Act I, Scene VII, line 36). Both Macbeth and his wife turn from good to evil when they discover that they have a chance to become powerful. .
Macbeth uses imagery of darkness to show that good prevails over evil.