I find it interesting because in the beginning of the scene, Juliet is giving a soliloquy where she spills her love for Romeo not knowing he is listening to every word. This gives Romeo the early upperhand and the confidence to pursue Juliet aggressively and even have the audacity to ask for her hand in marriage the first day they met. If he hadn't heard that secret information, I doubt their romance would have progressed as fast as it did. Romeo would likely have been more cautious, especially after having his heart broken by Rosaline. This bit of information likely led to their dramatic deaths because it gave them license to act wrecklessly knowing their deep feelings for one another that became contagious as they are shared.
This most poetic scene of Shakespeare's Romeo and Juliet, with its light/dark imagery and marvelous metaphors and other literary devices, is not only a joy to read and listen to for the beauty of its language, but it is interesting in these passages to note how revealing of the character of Romeo and Juliet the lines are.
For, the reckless nature of Romeo is clearly defined, first by his climbing the trees and scaling the walls of the orchard: "He jests at scar that never felt a wound." Secondly, when Juliet informs him that he will be killed if any of her kinsmen discover him, Romeo trivializes her statement,
With love's light wings did I o'erperch these walls,
For stony limits cannot hold love out.
And what love can do, that dares love atempt,
Therefore thy kinsmen are no let [hindrance] to me.
Even when Juliet responds, "If they do see thee, they will murder thee," Romeo says, "...there lies more peril in thine eye/Than twenty of their swords," further indicating his recklessness as well as his foolishness. Clearly, Romeo's behavior presages the tragedy to come.
In this scene, too, the reasonable Juliet of the first act, now also is intemperate in her response since she is enticed by Romeo's bravado. She admits to her passion, asking him if he loves her, declariing to him that she is "too fond":
But that thou overheard'st, ere I was ware,
My true love's passion. Therefore pardon me,
And not impute this yelding to light love,
Which the dark night hath so discovered.
Unlike herself in the first act, Juliet vacillates between her caution to which she returns after her declaration of passion: "I have not joy of this contract tonight." But, then, she is again passionate and reckless, too, at the end of the scene:
And all my fortunes at thy foot I'll lay
And follow thee my lord throughout the world.