Friar Laurence's Premonitions: During the marriage ceremony, Friar Laurence has premonitions of impending doom. He expresses fears that their marriage may be hasty and ill-fated, saying, "These violent delights have violent ends/And in their triumph die, like fire and powder." This foreshadows the tragic end of their love story.
The Nurse's Warning: The Nurse, who is present during the marriage, warns Juliet about the potential consequences of her marriage to Romeo. She says, "Think what you do, child. This is not sudden. Think thereon; it stands you upon this." However, Juliet's passionate love for Romeo leads her to ignore these warnings, setting the stage for the tragic consequences.
Romeo's Banishment: Romeo is already banished from Verona for killing Tybalt, Juliet's cousin. The marriage between Romeo and Juliet intensifies the feud between the Capulet and Montague families. This adds to the tragic situation, as Romeo's banishment makes it impossible for him to be with Juliet.
Juliet's Plan for Reunion: After the wedding, Juliet formulates a plan to reunite with Romeo. This includes faking her death and taking a sleeping potion to make it appear so. However, this plan is flawed and leads to a series of misunderstandings and tragic events.
Overall, the marriage of Romeo and Juliet in Friar Laurence's cell serves as a turning point in the play, foreshadowing the tragic events that will ultimately befall them. The premonitions of Friar Laurence, the Nurse's warnings, Romeo's banishment, and Juliet's desperate plan all contribute to the sense of impending doom and highlight the intensity of the love that ultimately leads to their downfall.