In these excerpts from "The Tragedy of Macbeth," the universal theme "the quest for power" is related to the universal theme "the relationship between violence and human nature" through Macbeth's actions and thoughts.
The correct answer is: Macbeth is willing to use violence to keep himself and his descendants in power.
In both excerpts, Macbeth is consumed by his quest for power and the fear of losing it. He is willing to resort to violence to maintain his position and ensure that Banquo's descendants do not challenge his authority. Macbeth acknowledges that he has committed murder and put his own peace at risk for the sake of securing his power and preventing Banquo's sons from becoming kings.
This shows a connection between the quest for power and the use of violence. Macbeth understands that power often requires violent actions to obtain and protect it. His willingness to employ violence demonstrates the dark side of human nature and the lengths to which individuals may go in their pursuit and preservation of power.