Roger Chillingworth suggested that he and Dimmesdale lodge in the same house, and friends of Arthur Dimmesdale arranged it.
Chillingworth moves in with Dimmesdale under the pretext of providing medical care, as Dimmesdale's health is deteriorating. However, Chillingworth's real intention is to further torment Dimmesdale by exacerbating his guilt and inner turmoil over his affair with Hester Prynne. It allows Chillingworth to closely observe and manipulate Dimmesdale, ultimately seeking revenge for the betrayal.
Chillingworth reminds dimmesdale of his sin and is party for the reason that he confesses and assends to heaven. He causes pain in the life of dimmesdale
Chillingworth discovers Dimmesdale's secret sin when he sees a mark in the shape of an "A" on the sleeping Dimmesdale's chest. This confirms his suspicions that Dimmesdale is the father of Hester Prynne's daughter, Pearl.
Chillingworth discovers a mark on Dimmesdale's chest, leading him to believe that Dimmesdale is hiding a secret sin related to the mark. This discovery fuels Chillingworth's suspicion that Dimmesdale is the father of Hester Prynne's child.
Roger Chillingworth wants revenge on Reverend Dimmesdale for having an affair with Hester Prynne. He seeks to torment Dimmesdale as he believes Dimmesdale is partly responsible for the shame and suffering that Hester endured. Chillingworth aims to expose Dimmesdale's guilt and hypocrisy.
Dimmesdale escapes Chillingworth by revealing his sin publicly during the Election Day procession, thus freeing himself from Chillingworth's hold over him. By confessing and acknowledging his guilt before the townspeople, Dimmesdale is able to gain his redemption and break free from Chillingworth's psychological torment.
Hester Prynne reveals to Reverend Dimmesdale that Roger Chillingworth is her husband. She discloses their secret marriage and the fact that Chillingworth is seeking revenge on Dimmesdale for his adultery with Hester.
Hester hopes to save Dimmesdale from the torment and manipulation of Chillingworth by revealing the truth about Chillingworth's identity as her husband. She believes that by knowing the truth, Dimmesdale can free himself from Chillingworth's control and find peace.
Chillingworth climbs the scaffold to witness Dimmesdale's public confession and moment of anguish. He wants to observe Dimmesdale's downfall and suffering as revenge for the affair with Hester Prynne. It is symbolic of the emotional and psychological torment that Chillingworth inflicts on Dimmesdale throughout the novel.
Chillingworth suggests that Dimmesdale could have successfully escaped him during the period when they were both staying in the wilderness, away from the prying eyes of the town. He believes that if Dimmesdale had chosen to leave civilization and live in seclusion, he would have been free from Chillingworth's manipulations.
He pretends to be Dimmesdale's doctor.
Hester's revelation about Chillingworth's true identity as her estranged husband has a profound impact on Dimmesdale. It deepens his guilt and accelerates his deteriorating physical and mental state as he grapples with the knowledge that Chillingworth has been purposely tormenting him under the guise of friendship. This revelation further complicates Dimmesdale's internal turmoil and contributes to his eventual downfall.
Roger Chillingworth approaches Dimmesdale just as he invites Pearl and Hester to join him near the scaffold.