William Shakespeare wrote sonnets that explored themes of love and beauty. His Sonnet 18 uses nature imagery to praise the beauty of his subject in a romantic way, while Sonnet 130 takes a more humorous tone in acknowledging the ordinary and flawed beauty of his mistress. Both sonnets follow the Shakespearean form of 14 lines with rhyming quatrains and a couplet, though they differ in their treatment of the subject's appearance and whether they embrace conventional beauty ideals. Shakespeare was skilled at expressing emotion through the sonnet form.