These two chapters clearly define the views of Hesters, Chillingsworth and the townspeople.
Hester has no malice toward Chillingswoth. She wants him to become human again and stop the revenge. He is apparently too far gone with jealousy and revenge to change. His age has a part to play in it too. He is older now and seems to be content with picking wildflowers and roots for his remedies. He is a very sad man who doesn't want his identity revealed. Does he not have the strength to stand by Hester's side. It was mentioned that she married him because of economic and class-conscious reasons and not love. He apparently was a dry boring scholar and thought it was a great idea to wed a young woman. This was the beginning of the end. Chillingsworth, in my opinion, was not a man of honor in any way. He wanted the public's approval, even over his own religious beliefs.
Hester transformed too. She has taken to helping the needy and not really caring about the reason why the scarlet letter in on her. She still has concern for Pearl and her interpretation of this letter.
Dimmesdale's health has taken a toll too. Guilt and judgment on himself has made him an old man.
I still don't know why Dimmesdale and Hester and Pearl didn't just leave and start a new life. It is a nice tangled literature type web.