What are some similes in Romeo and Juliet?
In act 1, scene 4, Mercutio and Benvolio try to convince Romeo to go with them to the party at the Capulet house. Romeo is still feeling melancholy because the girl he thinks he loves, Rosaline, does not reciprocate his love. He has not yet met Juliet. Mercutio, trying to convince Romeo to stop sulking and go to the party, says: "We waste our lights in vain, like lamps by day." This simile suggests that Romeo is wasting his time—and his youth—by obstinately sulking over one girl, when he could be enjoying himself at a party. Wasting his time like this is, Mercutio says, like burning a lamp during the day. In other words, it is futile and unnecessary.
In act 2, scene 3, Juliet worries that the intensity of her first meeting with Romeo might not augur well. She worries that the love they feel for one another might be too intense and too violent. She says that it is "too rash, too unadvised, too sudden; / Too like the lightning." This simile, comparing their love to lightning, suggests that their love will be intense but short lived. This proves of course to be a tragically accurate prediction.
In act 2, scene 6, Friar Laurence echoes Juliet's concerns about the love between her and Romeo when he says that it is "like fire and powder." The "powder" referenced here is gunpowder, and the "fire" is the spark that lights the gunpowder. This simile thus suggests that Romeo and Juliet's love will burn brightly for a short while before ultimately ending in an explosion—that is to say, tragically.