Nicene and Post-Nicene Fathers: Series II/Volume XI/John Cassian/Against Nestorius/Book I/Chapter 5

Chapter V.

By the case of Leporius he establishes the fact that an open sin ought to be expiated by an open confession; and also teaches from his words what is the right view to be held on the Incarnation.

from his confession or rather lamentation we have thought it well to quote some part, for two reasons: that their recantation might be a testimony to us, and an example to those who are weak, and that they might not be ashamed to follow in their amendment, the men whom they were not ashamed to follow in their error; and that they might be cured by a like remedy as they suffered from a like disease. He then acknowledging the perverseness of his views, and seeing the light of faith, wrote to the Gallican Bishops, and thus began: &#8220;I scarcely know, O my most venerable lords and blessed priests, what first to accuse myself of, and what first to excuse myself for. Clumsiness and pride and foolish ignorance together with wrong notions, zeal combined with indiscretion, and (to speak truly) a weak faith which was gradually failing, all these were admitted by me and flourished to such an extent that I am ashamed of having yielded to such and so many sins, while

at the same time I am profoundly thankful for having been able to cast them out of my soul.&#8221; And after a little he adds: &#8220;If then, not understanding this power of God, and wise in our conceits and opinions, from fear lest God should seem to act a part that was beneath Him, we suppose that a man was born in conjunction with God, in such a way that we ascribe to God alone what belongs to God separately, and attribute to man alone what belongs to man separately, we clearly add a fourth Person to the Trinity and out of the one God the Son begin to make not one but two Christs; from which may our Lord and God Jesus Christ Himself preserve us. Therefore we confess that our Lord and God Jesus Christ the only Son of God, who for His own sake was begotten of the Father before all worlds, when in time He was for our sakes made man of the Holy Ghost and the ever-virgin Mary, was God at His birth; and while we confess the two substances of the flesh and the Word, we always acknowledge with pious belief and faith one and the same Person to be indivisibly God and man; and we say that from the time when He took upon Him flesh all that belonged to God was given to man, as all that belonged to man was joined to God. And in this sense &#8216;the Word was made flesh:&#8217; not that He began by any conversion or change to be what He was not, but that by the Divine &#8216;economy&#8217; the Word of the Father never left the Father, and yet vouchsafed to become truly man, and the Only Begotten was incarnate through that hidden mystery which He alone understands (for it is ours to believe: His to understand). And thus God &#8216;the Word&#8217; Himself receiving everything that belongs to man, is made man, and the manhood which is assumed, receiving everything that belongs to God cannot but be God; but whereas He is said to be incarnate and unmixed, we must not hold that there is any diminution of His substance: for God knows how to communicate Himself without suffering any corruption, and yet truly to communicate Himself. He knows how to receive into Himself without Himself being increased thereby, just as He knows how to impart Himself in such a way as Himself to suffer no loss. We should not then in our feeble minds make guesses, in accordance with visible proofs and experiments, from the case of creatures which are equal, and which mutually enter into each other, nor think that God and man are mixed together, and that out of such a fusion of flesh and the Word (i.e., the Godhead and manhood) some sort of body is produced. God forbid that we should imagine that the two natures being in a way moulded together should become one substance. For a mixture of this sort is destructive of both parts. For God, who contains and is not Himself contained, who enters into things and is not Himself entered into, who fills things and is not Himself filled, who is everywhere at once in His completeness and is diffused everywhere, communicates Himself graciously to human nature by the infusion of His power.&#8221; And after a little: &#8220;Therefore the God-man, Jesus Christ, the Son of God, is truly born for us of the Holy Ghost and the ever-virgin Mary. And so in the two natures the Word and Flesh become one, so that while each substance continues naturally perfect in itself, what is Divine imparteth without suffering any loss, to the humanity, and what is human participates in the Divine; nor is there one person God, and another person man, but the same person is God who is also man: and again the man who is also God is called and indeed is Jesus Christ the only Son of God; and so we must always take care and believe so as not to deny that our Lord Jesus Christ, the Son of God, Very God (whom we confess as existing ever with the Father and equal to the Father before all worlds) became from the moment when He took flesh the God-man. Nor may we imagine that gradually as time went on He became God, and that He was in one condition before the resurrection and in another after it, but that He was always of the same fulness and power.&#8221; And again a little later on: &#8220;But because the Word of God vouchsafed to come down upon manhood by assuming manhood, and manhood was taken up into the Word by being assumed by God, God the Word in His completeness became complete man. For it was not God the Father who was made man, nor the Holy Ghost, but the Only Begotten

of the Father; and so we must hold that there is one Person of the Flesh and the Word: so as faithfully and without any doubt to believe that one and the same Son of God, who can never be divided, existing in two natures (who was also spoken of as a &#8220;giant&#8221; ) in the days of His Flesh truly took upon Him all that belongs to man, and ever truly had as His own what belongs to God: since even though He was crucified in weakness, yet He liveth by the power of God.&#8221;