How does Shakespeare introduce the ides of opposites being the same?

Shakespeare introduces the idea of opposites being the same through the theme of paradox in several of his plays, such as in Romeo and Juliet with the famous line "O brawling love, O loving hate!" This idea is also presented through characters who embody contradictory traits, like Macbeth who is both valiant and ruthless. Shakespeare explores the complexity of human nature by showcasing how seemingly opposing qualities can coexist within the same individual or situation.