1. In Macbeth, the witches' statement "fair is foul and foul is fair." (Act 1, Scene 1, Line 10) we can say that Macbeth considered the witches to be "fair" when in reality their intentions were quite "foul." Similarly, although Macbeth has the semblance of the friendly and loyal to host, ("fair") he is secretly plotting Duncan's death ("foul"). The first point is that evil is like a disease, evil infects its victims and makes them sicken until they eventually die. Once Macbeth murders Duncan, it is similar to commit his inner innocence by himself. Therefore, he can’t sleep and rest because he kills his conscience. Macbeth being "sucked into" evil changed drastically. Evil, unfortunately is a very powerful force once it gets a hold of you once, it's extremely difficult to let go of. If one have to take drastic actions as far as death to get what he wants is really a sad case. The second point is that evil disrupted nature itself. In nature, there is a time and a place for everything. When Macbeth achieves the crown by murder, he upsets the natural order of his life along with the order of Scotland. Without the rightful, God-given king on the throne, all of society is disordered. Under Macbeth's rule, there can only be chaos and evil.
Our initial impression of Macbeth is a brave and capable warrior with strong morals. However, as the play went on, Macbeth's morality lessened immensely. When Macbeth encounter with the three witches, he awakens in him a deep impatient ambition. He is not totally cold and solely ambitious as shown by his terror of the murder image, which thoroughly defies his loyalty. And we realize that his physical courage is joined by a consuming ambition and a tendency to self-doubt. Lady Macbeth’s suicide does not strike him so much with grief but rather unleashes his disenchantment and pessimistic view of life. On seeing that he will lose the war, he considers but then dismisses suicide. He still clings to the second prophecy of the witches that nobody born of woman can hurt him. His own ambitions and passions deceived him into changing his virtues for unrest and immorality. At the end, he pays all the consequences of his betrayal but still dies like a brave soldier.
Lady Macbeth is a frightening female character. On her first debut, she pursues her goals with greater determination, yet she is less capable of withstanding the repercussions of her immoral acts. She spurs Macbeth mercilessly to kill Duncan and urges him to be strong in the murder’s aftermath. She is stronger, more ruthless, and more ambitious than her husband. She told Macbeth that she can cruelty kill her own child while the baby enjoys eating. At the same time, we cannot help noticing that women are also violence and evil. She wishes herself could be “unsexed.” Macbeth’s character implies that she is a masculine soul inhabiting a female body, which seems to link masculinity to ambition and violence. But she is eventually driven to distraction by the effect of Macbeth’s repeated bloodshed on her conscience.