Shakespeare explored many themes in his works, including brutality, power hunger, betrayal, plotting, fate, superstition, ambition, corruption, revenge, madness, love, jealousy, and the conflict between appearance and reality. His plays such as Hamlet, Macbeth, King Lear, Othello, Romeo and Juliet, and Richard III dealt with these themes and examined human nature. Shakespeare also used sonnets to explore themes of love, beauty, and the ephemeral nature of life. His works remain widely studied today because the themes of human nature and condition are still relevant.