All hail, Macbeth, that shalt be king hereafter!(1.3.53) Thou shalt get kings, though thou be none. So all hail, Macbeth and Banquo! (1.3.69-70)
I dreamt last night of the three weird sisters: To you they have showed some truth. (2.1.23-24)
Yet, when we can entreat an hour to serve, we would spend it in some words upon that business,
Is this a dagger which I see before me, The handle toward my hand? Come, let me clutch thee. I have thee not, and yet I see thee still. (2.1.41-43)
(Macbeth and Banquo enter) The evil witches meet Macbeth and Banquo with a set of prophecies, stating that Macbeth will retrieve the position of the King. The witches here have began to interrupt the Natural World Order.
That which hath made them drunk hath made me bold. What hath quenched them hath given me fire. Hark! Peace! It was the owl that shrieked, the fatal bellman. (2.2.1-5)
(Banquo enters) After hearing the prophecies, Banquo is having deep thoughts of the witches, causing disruption in this sleep. As Banquo consults Macbeth, Macbeth bids banquo farewell and decides to speak out this later.
I have done the deed. (2.2.26)
Macbeth visualizes a bloody dagger in front of him,. Instead, it turned out to solely be a vision. However, this vision has a symbolic meaning of calling Macbeth to kill King Duncan. THe dagger is a representation of his confused state of mind whether he should follow his regicide or not.
To know my deed, ’twere best not know myself. (2.2.89)
(Enter Lady Macbeth) Lady Macbeth is at the courtyard waiting for her husband, Macbeth. her impatience drives her crazy as she speaks in a loud tone, despite the fact that the bodyguards can hear her.
(Enter Macbeth) Macbeth is holding the bloody dagger which he used to kill King Duncan. Macbeth is somewhat glad since he has fulfilled his ambition. However, he has broken the great Chain of Being by killing the highest level breach of duty and loyalty
This is a flashback of Macbeth's memory of killing King Duncan. He himself believes that he cannot face the consequences and guilt built from the crime. This causes Macbeth to have a guilty conscience.