morals, but extends his infallibility to all acts in the fullest exercise of his supreme magisterium or doctrinal authority.
V. Fifthly, the definition declares that in these acts the Pontiff 'ea infallibilitate pollere, qua Divinus Redemptor Ecclesiam suam in definienda doctrina de fide et moribus instructam esse voluit;' that is, that he is possessed of the infallibility with which our Divine Saviour willed that His Church should be endowed.
It is to be carefully noted that this definition declares that the Roman Pontiff possesses by himself the infallibility with which the Church in unison with him is endowed.
The definition does not decide the question whether the infallibility of the Church is derived from him or through him. But it does decide that his infallibility is not derived from the Church, nor through the Church. The former question is left untouched. Two truths are affirmed; the one, that the supreme and infallible doctrinal authority was given to Peter, the other, that the promise of the Holy Spirit was afterwards extended to the Apostles. The promises 'Ego rogavi pro te,' and 'Non prævalebunt,' were spoken to Peter alone. The promises 'He shall lead you into all truth,' and 'Behold, I am with you all days,' were spoken to Peter with all the Apostles. The infallibility of Peter was, therefore, not dependent on his union with them in exercising it; but, their infallibility was evidently dependent on their union with him. In like manner, the whole Episcopate gathered in Council is not in-
