In Romeo and Juliet Act 2, Scene 3, Friar Lawrence says that even a good thing can be twisted or abused into a poisonous thing. How does this principle relate to Romeo and Juliet's romance?

Ill she not be here anon? is she not hurrying to upbraid me for my haste? have i not heard her footstep on the stair? do i not distinguish that heavy and horrible beating of her heart? what is the effect of parallelism in this excerpt? it emphasizes usher’s misunderstanding. it emphasizes usher’s love for his sister. it emphasizes usher’s psychological fixation. it emphasizes usher’s melancholy nature.