Final answer:
Both Juliet and Capulet undergo a change of perspective and priorities.
Step-by-step explanation:
The common thread between the changes of heart in both Juliet and Capulet is that they both had a change of perspective and priorities. Initially, Juliet and Capulet adhered to the feuding between their families and held strong beliefs about loyalty and honor. However, as the story progresses, they both undergo a transformation in their views. Juliet's change is evident when she defies her family's expectations and chooses to be with Romeo. Capulet's change becomes apparent when he decides to put an end to the feud and reconcile with the Montagues.