Dimmesdale decides to flee Boston with Hester. He calls her his "angel" and says he's been renewed. Hester flings away her scarlet letter and feels an enormous swell of relief.
Dimmesdale and Hester discuss Pearl, whom Hester says she barely understands. Pearl, meanwhile, has been playing alone in the forest, where she fits in well among the wild animals. Hester calls her to come meet Dimmesdale, her father.
Unity with nature shows purity. The implication is that Pearl, and therefore her parents' affair, are not sinful against God. They only sin against Puritanism.