The Crucible is a fantastic piece that deals with guilt, lies, and honor. You use the word pride, but by the end, I think we see honor.
I would write a statement like this:
The Crucible clearly demonstrates the theme of pride through the characters of John and Elizabeth Proctor.
I say this because in Act 4, Elizabeth doesn't turn on John and confesses how she led him to an adulterous relationship by keeping a cold house. John, likewise refuses to confess to witchcraft because he isn't a witch. Knowing he will die for telling the truth, he keeps telling the truth. These two examples should fulfill your theme statement.