Final answer:
The quote is from Act III, Scene III of Shakespeare's 'Romeo and Juliet', where Romeo expresses his despair over being banished from Verona and from Juliet's presence.
Step-by-step explanation:
The quotation you've provided is from Act III, Scene III of William Shakespeare's tragedy, Romeo and Juliet. In this monologue, Romeo is lamenting his banishment from Verona and the fact that even the lowest creatures can see Juliet, but he, her husband, cannot. The quote is symbolic of Romeo's deep despair and his intense feelings of love towards Juliet. This section captures Romeo’s existential anguish and his perception that being banished from Juliet's presence is akin to being barred from heaven itself, thus reflecting the play's central theme of love versus fate.