As to the words of St. Peter to Simon Magus, from which
the Novatians infer that there was no forgiveness for the latter, it is
pointed out that St. Peter, knowing his evil heart, might well use
words of doubt, and then by some Old Testament instances it is pointed
out that “perchance” does not exclude forgiveness.
The apostles transmitted to us that penitence, the fruits of which are
shown in the case of David. St. Ambrose then adduces the example
of the Ephraimites, whose penitence must be followed in order to gain
the divine mercy and the sacraments.