I am Thane of Cawdor. If good, why do I yield to that suggestion Whose horrid image doth unfix my hair And make my seated heart knock at my ribs, Against the use of nature? Present fears Are less than horrible imaginings. My thought, whose murder yet is but fantastical, Shakes so my single state of man That function is smothered in surmise, And nothing is but what is not(Shakespeare Act 1 scene 3).
In this quote the witches are telling Macbeth that king duncan is going too be murdered and Macbeth will become the new king. Macbeth is thinking about a murder that hasn't happened yet.
Still it cried 'Sleep no more!' to all the house: 'Glamis hath murder'd sleep, and therefore Cawdor Shall sleep no more; Macbeth shall sleep no more(Shakespeare Act 2 Scene 2).
Is this a dagger which I see before me, The handle toward my hand? Come, let me clutch thee(Shakespeare Act 2 scene 1).
Macbeth is seeing a dagger because his wife told him to so he can become king. He is hallucinating the dagger he is going to kill king Duncan with.
And on thy blade and dudgeon gouts of blood, Which was not so before. There's no such thing: It is the bloody business which informs Thus to mine eyes(Shakespeare Act 2 scene 1).
Macbeth is still seeing the dagger and is going crazy. This proves his descent into madness.
Macbeth is going crazy after he killed King duncan. He is saying he can't sleep after he killed king Duncan because he is haunting him.
It will have blood, they say. Blood will have blood. Stones have been known to move, and trees to speak. Augurs and understood relations have By maggot pies and choughs and rooks brought forth The secret’st man of blood(Shakespeare Act 3 Scene 4).
There is a lot of blood because of all the mureder that has happened so far. Macbeth killed King duncan, and banquo which shows how he goes crazy.
She should have died hereafter. There would have been time for such a word. Tomorrow, and tomorrow, and tomorrow Creeps in this petty pace from day to day To the last syllable of recorded time. And all our yesterdays have lighted fools The way to dusty death. Out, out, brief candle. Life’s but a walking shadow, a poor player That struts and frets his hour upon the stage, And then is heard no more. It is a tale Told by an idiot, full of sound and fury, Signifying nothing(Act 5 Scene 5).
Macbeth is proving how cold he can get after his wife's death. He didn't want her to die today, he was hoping she would die some other time just not now. Which proves him being crazy.