" At their root, the key and the Confessor both authenticate the truth. The Confessor's power would force the subject to reveal the truth, while all of the coded alignments of the key involve proofing it against reality. Reality is truth. Therefore, both the Confessor and the key need the same formulas to initiate their ultimate function. "

― Terry Goodkind , The First Confessor (The Legend of Magda Searus, #1)