What first twelve lines spoken by Romeo sum up the theme of the play as a whole?

In the first twelve lines spoken by Romeo in the play, he talks about his unrequited love for Rosaline, using imagery of storms and despair. This sets the tone for the theme of forbidden love, passion, and the consequences of rash decisions that run throughout the play. Romeo's intense emotions and impulsive actions drive the tragic events that unfold in "Romeo and Juliet."