Shakespeare's use of paradox in How does it relate to the play's theme? What is Shakespeare saying about life/morality/society?

You are responsible for your own deeds.

Explanation:

In this case, Hamlet is talking about how he plans to kill Claudio to avenge his father's death. Her mother is now married to Claudio, so, of course, it will be a tragedy for her. However, she no longer wants her mother to be her father's killer lover (without her knowing it). He believes the murder will be for his own good.