Romeo speaks these lines in the so-called balcony scene, when, hiding in the Capulet orchard after the feast, he sees Juliet leaning out of a high window (2.1.44–64). Though it is late at night, Juliet’s surpassing beauty makes Romeo imagine that she is the sun, transforming the darkness into daylight.
But, soft! what light through yonder window breaks?It is the east, and Juliet is the sun.Arise, fair sun, and kill the envious moon,Who is already sick and pale with grief,
This shows how Juliet is upset of Romeos last name, and wishes their families were enemies.
O Romeo, Romeo! wherefore art thou Romeo?Deny thy father and refuse thy name;Or, if thou wilt not, be but sworn my love,And I'll no longer be a Capulet.
This shows how Romeo had to leave before Juliets kinsmen would kill Romeo
'Tis almost morning; I would have thee gone:And yet no further than a wanton's bird;Who lets it hop a little from her hand,Like a poor prisoner in his twisted gyves,And with a silk thread plucks it back again,So loving-jealous of his liberty.