A most effective literary technique, personification illuminates an idea for readers and audiences. For, in the attribution of human qualities to an object, an animal, a natural force, or an idea, personification explains and provides vivid images which expand the readers/audiences knowledge of an author's ideas.
In scene 5 of Act II, Juliet waits anxiously for the Nurse to return with news from Romeo. Juliet complains that the Nurse is old and takes her time; were she is love as Juliet is, perhaps she would return more quickly. In a beautiful personification Juliet reflects,
Love's heralds should be thoughts,
Which ten times faster glide than the sun's beams
Driving back shadows over low'ring hills.
Therefore do nimble-pinion'd doves draw Love, (2.5.4-7)
In this passage, Shakespeare personifies love as having heralds, or messengers; therefore, Love is elevated to regal status. Likewise, there is personification in Juliet's attributing the physical act of gliding to thoughts which are abstract.