These violent delights have violent ends
And in their triumph die, like fire and powder,
Which as they kiss consume.
– William Shakespeare
Romeo and Juliet, Act 2, Scene 6. Friar Laurence uses a gunpowder simile and kiss metaphor to show how rash love and going too fast can be dangerous and lead to a destructive ending. He is warning Romeo about acting impulsively and advising him to cool his extreme passion. This is after Romeo dares "love-devouring death" to try to come between him and his love for Juliet. The Friar is worried that their hasty marriage could have violent and dangerous consequences. This is an example of foreshadowing, since the Friar’s fears become reality.