How is John Proctor's Dynamic Character changed, in the book The Crucible by Arthur Miller.I was wondering about this question, so i could include the answer in a Critical lens essay i am writing  

Expert Answers
gmuss25 eNotes educator| Certified Educator
A dynamic character is someone who undergoes a change in behavior, attitude, or perspective throughout a story. John Proctor experiences an internal change and ends up becoming a martyr by the end of the play. Toward the beginning of the play, John distances himself from the witch trials and is content maintaining his reputation as a morally upright, Christian farmer. John has no intention of being involved in the witch trials and does not plan on exposing his dark secret. However, after his wife is falsely accused of witchcraft, John makes the difficult decision to challenge the Salem court. John's decision to force Mary Warren to address the court in hopes of saving his wife's life reveals his emotional development.

In act 3, John Proctor attempts to sway the court by exposing his infidelity. Proctor's decision to ruin his reputation to save Elizabeth's life while simultaneously discrediting the court reveals his change of heart. Proctor selflessly sacrifices his outstanding reputation in hopes of discrediting Abigail. Unfortunately, Elizabeth attempts to preserve her husband's reputation and ironically dooms him by denying John's infidelity.

In act 4, Proctor again displays his emotional development and change of heart after he signs his confession. Proctor realizes that his confession will be used by the court to support their decisions, which is something that John prevents from happening by tearing his confession. Proctor displays his courage, integrity, and resolve by becoming a martyr at the end of the play. Overall, John Proctor changes from a relatively private, distant citizen, who is harboring a dark secret, to an exposed, courageous man, who is willing to die in order to challenge the corrupt court. 
Ashley Kannan eNotes educator| Certified Educator

Proctor evolves throughout the play from being a spiritually ambivalent figure to its moral compass.  At the start of the play, Proctor is uncertain of many things.  He regrets his affair with Abigail, but still lacks the full force of being able to take a stand.  As the play progresses, he is able to not only be able to call out Abigail's actions, but he delivers the most impassioned pleas for individuals not capitulate to the political pressure of "naming names," but rise and defend reputations in the name of truth and justice.  When he refuses to sign a confession that is false, it becomes a moment when the audience can identify with Proctor, an ordinary man who has been placed in bizarre circumstances and has ended up becoming an extraordinary moral and spiritual figure.

pohnpei397 eNotes educator| Certified Educator

To me, the major change in John Proctor's character is that he goes from being a very troubled man who is wracked with guilt to being one who is serene at the end of the play.

At the start of the play, Proctor feels so guilty because of the fact that he had this affair with Abigail Williams.  It haunts him and makes him think very poorly of himself.

By the end of the play, though, he is able to regain a positive self-image.  He gets to the point where he feels good enough that he is willing to die to protect his good name.