The document discusses themes of lightness/darkness and the sun/moon in Shakespeare's Romeo and Juliet. It states that Romeo is associated with the moon while Juliet is depicted as the sun. Their love and interactions are only possible at night when Romeo, as the moon, is present in the sky. However, their decisions made at night ultimately lead to darkness and their tragic ending. It also explores how Romeo receives dreams that foreshadow their fate, showing the moon cannot be with the sun, just as Romeo and Juliet's opposing roles result in calamity.