"Great Dunsinane he strongly fortifies // some say he's mad, others that lesser hate him."
I will go through Macbeth's soliloquies and chart his character as it changes. A soliloquy is a speech made only to oneself, or even only thought.
Macbeth's first soliloquy is in Act I, Scene III. Two of the things that the witches predicted have come true and Macbeth is contemplating how the third will come true. He thinks about killing Duncan, but he knows that these are only thoughts and he dismisses it and decides to leave it to chance and time.
"Present Fears // Are less than horrible imagining."
"Whose (Duncan) murder is yet but fantastical."
We can see that his mind is confused and distorted, because of what has happened and what may happen, and here we see the first signs of ambition, even though it is dismissed.
"My thought . // Shakes so my single state of man."
The second soliloquy is in Act I, Scene IV, when the Thane of Cawdor has been killed. Duncan describes him as a man on whom I built an absolute trust'. This parallels Macbeth, who he trusts, when he betrays him. Duncan pronounces his son as the prince of Cumberland and the heir to the throne. This throws Macbeth's mind into even more confusion, as this is a step which (he) must o'er-leap. He also, in the soliloquy, knows that his thoughts are evil, and he does not want good to see them.
"Stars, hide your fires, // Let not light see my black and deep desires."
In the third soliloquy Macbeth is still contemplating how he obtains the throne, but now he knows that murder is the only way, yet he