At this point he feels that his life is very bleak and he is generally feeling very awful and worthless. However, almost immediately after he says this he manages to cover up for the murder of Duncan by lying to Macduff about the killing of the stableboys who he alleged had murdered Duncan:.
"those of his chamber, as it seem'd had done't:.
their hands and faces were all badg'd with blood;.
so were their daggers, which unwiped we found.
upon their pillows: they star'd and were distracted;.
no man's life was to be trusted with them".
By lying to Macduff it shows that he still wants to fulfill his side of the prophecy by becoming the King of Scotland. This means that Macbeth is no longer so devastated about the killing of the King as was first indicated in the play and demonstrates the alluring sexual power of Lady Macbeth who is ambitious to become the Queen. Macbeth is easily led by his wife, because had she not been there to push him along with the murder then in all probability, Macbeth would not have killed Duncan. His actions also show his greed and ambition by killing someone he apparently dearly loved. By Act 3 Scene 1, Macbeth is becoming more ruthless and determined, in that he is wanting to kill Banquo, as Banquo is the only person who could possibly suspect Macbeth as the killer of Duncan. In my view his actions may point towards Macbeth having an inferiority complex. A fantasy of his is that he is trying to create a safe world for himself whereby he is completely in control of Scotland. His idea is to form an autocracy and to fit that fantasy Macbeth has tried to become more pompous and divine and basically become a better version of Duncan. Duncan's main weakness was that he was too trusting, whereas it can be noticed that Macbeth is not trusting at all, for example, he does not trust the murderers. Macbeth used to be very humble to everybody and that was noted by all around him but later he acts more like a dictator.