O, speak again, bright angel! for thou art
As glorious to this night, being o'er my head
As is a winged messenger of heaven
Unto the white-upturned wondering eyes
Of mortals that fall back to gaze on him
When he bestrides the lazy-pacing clouds
And sails upon the bosom of the air. (2.2.28-34)
Romeo's conceit bears a striking resemblance to Macbeth's description of the aftermath of Duncan's murder:
And pity, like a naked newborn babe
Striding the blast, or heaven's cherubin horsed
Upon the sightless couriers of the air,
Shall blow the horrid deed in every eye. (1.7)
Mabillard, Amanda. Romeo and Juliet Balcony Scene Glossary. Shakespeare Online. 20 Aug. 2000. (date when you accessed the information) < http://www.shakespeare-online.com/plays/wingedmessenger.html >.
