If a thief or a brigand is captured and denies what he is accused of, you hold that the judge should rain blows on his head and pierce his sides with points of iron until he tells the truth. Neither divine law, nor human law, consents to this: confessions must be not forced, but spontaneous; they must not be extorted, but obtained voluntarily. If it so happens that after inflicting these punishments, you discover absolutely none of the offences with which the prisoner is charged, do you not blush, at least then, and do you not recognize how impious your judgement was ? Similarly, if the prisoner, unable to stand such tortures, confesses to crimes that he has not committed, who, may I ask, bears the responsibility for such impiety if not the man who forced him to make these untrue confessions? Moreover, if someone utters words which do not come from his heart, he speaks but he does not confess. So abandon these execrable practices, and renounce, from the bottom of your heart, what you have been mad enough to do in the past. What benefit have you derived from that for which you now blush? (Pope Nicholas I to the Bulgarians, 13 November 866)