BOY: Ooh, ooh. He jests at scars that never felt a wound. But, soft! What light through yonder window breaks? It is the east, and Juliet is the sun.
The quote is from Act 2, Scene 1 of Romeo and Juliet, the famous “balcony scene” where Romeo hides in the orchard after the Capulet’s party where he met Juliet, then sees her leaning out of her window. He compares her beauty to that of the sun, moon, and stars.