As the tragic hero of Arthur Miller's "The Crucible," John Proctor falls from grace over the course of the play. However, he manages to redeem at least his own sense of integrity by the end.
At the beginning of the play, he is, at least in public, an honorable and honest man. When Abigail Williams's jealousy of Proctor's wife Elizabeth sparks witch-hunting hysteria in Salem, Proctor is faced with a difficult decision of whether to admit to his affair with Williams and ruin his name or to remain silent and lose his own integrity. Ultimately he chooses to admit his affair and is condemned as a witch.
As a final act to save his soul and public image, he refuses to sign a confession, understanding that this will condemn him to death.