Hence it is intriguing that the convoluted and enigmatic life
of Tertullian should take an unexpected turn, where in disgust with the
teachings of the «established» church, especially in its
teaching on post-baptismal sin [41] and its growing dependence on the office
of the
bishop, [42] he forsook this expression
of Christianity for the Montanist movement (and finally, perhaps, for his own sect), with its heavy emphasis on the
role of the Spirit and on purity.
For example, in Ordinatio Sacerdotalis he seems to express a further aspect
of the
role of the Pope: the Pope by his own authority not only
teaches the Faith as the head
of the College
of Bishops but is also able to discern clearly what
teachings are indeed infallibly
taught by the Ordinary Magisterium
of the Church.