I would say that John Proctor would represent the theme of integrity in Miller's work. The idea of the theme of integrity involves being able to stand for values that are transcendent, universal, and represent the "better" angels of one's nature. In refusing to sign the confession and understanding what this sacrifice entails, Proctor represents integrity in a setting that completely is devoid of it. Its thematic development is critical in two elements. The first is that specific characters represent it, and the second is that others around them do not. At a time when so many in the town are simply signing confessions known to be false so that they may protect their own interests, Proctor defies this in his display of integrity. When he asserts or clings to the idea of his own "name," it represents a moment where the purity of integrity overcomes the impurity of Salem:
Because it is my name! Because I cannot have another in my life! Because I lie and sign myself to lies! Because I am not worth the dust on the feet of them that hang! How may I live without my name? I have given you my soul, leave me my name!