Avaunt! and quit my sight! let the earth hide thee!
Thy bones are marrowless, thy blood is cold;
Thou hast no speculation in those eyes
Which thou dost glare with!
Act III Scene 4-Macbeth
Summary: Macbeth is talking about the ghost of Banquo. Macbeth is afraid of the ghost because he ordered the murderers to get rid of Banquo. Since, a ghost has died, its bones will be marrowless and that there eyes have no speculation in them.
Comment: Macbeth is frightened when he sees Banquo’s ghost. In this case, “blood” refers to the remains of a ghost. The quote says that the blood is cold. It does not really mean that the blood is cold, but that there is a figurative language being put in place.
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 magot-pies and choughs and rooks brought forth
The secret'st man of blood. What is the night?
Act III Scene 4-Macbeth
Summary: Macbeth has killed Banquo and believes that the birds are talking to him. In reality, Macbeth is being delusional towards this situation.
Comment: Macbeth says that tonight something will occur. He does not know if it will be a person or an object. In this context, “blood” points out the fact that there is a premonition that something bad will happen tonight.
That, by the help of these--with Him above
To ratify the work--we may again
Give to our tables meat, sleep to our nights,
Free from our feasts and banquets bloody knives,
Do faithful homage and receive free honours:
All which we pine for now:
Act III Scene 6-Lord
Summary: Since Macbeth is the new king of Scotland; he has the power to control anything. The lord wants to get rid of Macbeth by asking for assistance and try to form a democratic government. There is a coincidence that every time that there is a party someone ends up getting murdered. If there are going to be banquets in the future, there cannot be anyone being killed.
Comment: In an attempt to remove King Macbeth, the lord asks for assistance from other areas in Scotland. In this case, “blood” describes the knives in the banquet. In reality, bloody knives means that people are getting killed in banquets.