MACBETH

Stay, you imperfect speakers, tell me more.
By Sinel’s death I know I am thane of Glamis.
But how of Cawdor? The thane of Cawdor lives,
A prosperous gentleman, and to be king
Stands not within the prospect of belief,
No more than to be Cawdor. Say from whence
You owe this strange intelligence, or why
Upon this blasted heath you stop our way
With such prophetic greeting. Speak, I charge you.
Macbeth has just encountered three witches that just told him that he is going to be thane of Cowdor as well as king of Scotland and his  current position thane of Glamis. And he is really frustrated about the witches are talking abut something that is impossible.
MACBETH

Your children shall be kings.
BANQUO

     You shall be king.
The fact that Banquo is the friend of Macbeth, and Macbeth is predicted to be king of Scotland, and that Banquo’s sons will be kings. This type of stuff will create a conflict between Macbeth and banquo.

MACBETH

(aside) If chance will have me king, why, chance may crown me
Without my stir.
After the encounter of the witches, Macbeth’s confidence raises because he says that if the witches want him to be king, then he is open for it. In fact he needs to do nothing to become king he says.

MACBETH

(aside) The prince of Cumberland! That is a step
On which I must fall down, or else o’erleap,
For in my way it lies. Stars, hide your fires;
Let not light see my black and deep desires.
The eye wink at the hand, yet let that be
Which the eye fears, when it is done, to see.
After knowing that Malcom is prince of Cumblerland, Macbeth has the King’s position in his eye sight. Which makes Macbeth in isolation. Therefore he speaks to what I regard as his evil friend Lady Macbeth (his wife) which poisons his mind to killing Duncan.

MACBETH

     Whence is that knocking?
How is ’t with me when every noise appals me?
What hands are here? Ha! They pluck out mine eyes.
Will all great Neptune’s ocean wash this blood
Clean from my hand? No, this my hand will rather
The multitudinous seas incarnadine,
Making the green one red.
After killing Duncan, Macbeth regrets killing him. He gets to crazy to the point were he thinks God is knocking on the paces door. He also feels too guilty to the point were he thinks that even the ocean cannot wash out the blood in his hands.