Why does chillingworth say that he seeks no vengeance against Hester?

Chillingworth has many different feelings towards Hester. He is, of course, angry but he also believes that he is in part responsible for the entire situation because he never should have married Hester when she was so young and beautiful and full of life and he was an old, deformed, bookish man. He also respects her because she has borne all of the punishment for a sin that took two to commit. He thinks that whoever Hester had the affair with should have stepped up and admitted to it instead of leaving Hester to bear all of the judgement herself. He understands that Hester has suffered enough for her crime and that is why he only torments Dimmesdale. It is important to understand that Chillingworth could have come forward at any time and admitted to being Hester's husband, in which case she would have been executed for adultery instead of the lesser sin of fornication that she was convicted of. He kept his true identity a secret because of the things mentioned above and because admitting that his wife had an affair was embarrassing.