(4) The enthusiastic view of the possibilities of the Christian life - associated, as modern and especially Western Christians must suspect, with shallow external views of sin - lent itself to belief in sinless perfection.
Even St Paul has been supposed, not without a certain plausibility, to teach the sinless perfection of real Christians.
Now this God-man, as sinless, is exempt from the punishment of sin; His passion is therefore voluntary, not given as due.
Later tradition has changed all that, and made him sinless and almost divine.
He is the one who fulfills the Old Testament by his sinless life.