O, she doth teach the torches to burn bright!
It seems she hangs upon the cheek of night
Like a rich jewel in an Ethiope’s ear;
Beauty too rich for use, for earth too dear!
So shows a snowy dove trooping with crows,
As yonder lady o’er her fellows shows.

– William Shakespeare

Romeo and Juliet, Act 1, Scene 5. These lines tell us how Romeo is smitten by Juliet when he first lays eyes on her at the Capulets’ ball. In the first line Romeo uses a metaphor to compare Juliet to a torch lighting up the room. Then in a simile he compares her shining beauty against the night to an jeweled earring sparkling on the ear of an Ethiopian. Another metaphor likens Juliet to a magnificent "snowy dove" in a room full of "crows." Romeo uses the imagery of light against the dark to describe the radiance of Juliet’s loveliness. His speech indicates a love-at-first-sight moment for the young man. But Romeo’s ominous statement that Juliet has "beauty too rich to use, for earth too dear" is foreshadowing of how she will be laid out in the tomb too early and of the tragic events that follow. We also see here an example of Romeo’s impetuous and impulsive behavior. From being depressed before this over his unrequited love for Rosaline, he instantly falls for Juliet the moment he sets eyes on her. This is a case of situational irony, since Romeo came to the Capulet party hoping to see Rosaline, so one wouldn’t expect him to instantly fall in love with another girl.