Christ.’
“If it were not for the Church of Christ there would be nothing to restrain the criminal from evil doing, no real chastisement for it afterwards; none, that is, but the mechanical punishment spoken of just now, which in the majority of cases only embitters the heart; and not the real punishment, the only effectual one, the only deterrent and softening one, which lies in the recognition of sin by conscience.”
“all these sentences to exile with hard labour, and formerly with flogging also, reform no one, and what’s more, deter hardly a single criminal, and the number of crimes does not diminish but is continually on the increase. You must admit that. Consequently the security of society is not preserved, for, although the obnoxious member is mechanically cut off and sent far away out of sight, another criminal always comes to take his place at once, and often two of them. If anything does preserve society, even in our time, and does regenerate and transform the criminal, it is only the law of Christ speaking in his conscience. It is only by recognising his wrongdoing as a son of a Christian society that is, of the Church that he recognises his sin against society”
Bk II ch.6