And yet, to me, what is this quintessence of dust?
Act II, Scene 2 · Hamlet
Context
Hamlet ends his catalog of human greatness with a question that undercuts everything he has just said.
Analysis
The oxymoron 'quintessence of dust' fuses the highest and lowest: 'quintessence' means the purest essence, but 'dust' is decay and death. The juxtaposition collapses all the prior praise into nothing—if humans are ultimately dust, then their 'infinite faculties' are meaningless.
Essay Tip
Use this to argue that Hamlet's philosophical vision is reductive and nihilistic—he can only see the endpoint (death) rather than the process (life), which drains meaning from everything he observes.