It is the spirit that gives life; the flesh profits nothing: the words that I speak unto you, they are spirit, and they are life.
All Commentaries on John 6:63 Go To John 6
Cyril of Alexandria
AD 444
The words that I have spoken unto you, they are Spirit and are life.
He filleth whole His Own Body with the Life-giving operation of the Spirit. For He now calls the Flesh Spirit, not turning It aside from being Flesh: but because by reason of Its being perfectly united to Him, and now endued with His whole Life-giving Power, It ought to be called Spirit too. And no wonder, for be not offended at this. For if he that is joined unto the Lord is one spirit, how shall not His Own Body rather be called One with Him? Something of this kind then He means in the passage before us: I perceive from your reasonings within you (saith He) that ye foolishly imagine that I am telling you, that the body of earth is of its own nature life-giving: but this is not the drift of My words. For My whole exposition to you was of the Divine Spirit and of Eternal Life,. For it is not the nature of the flesh which renders the Spirit life-giving, but the might of the Spirit maketh the Body life-giving. The words then which I have discoursed with you, are spirit, that is spiritual and of the Spirit, and are life, i. e., life-giving and of that which is by Nature Life. And not as repudiating His Own Flesh does He say these things, but as teaching us what is the truth. For what we have just said, this will we repeat for profit sake. The nature of the flesh cannot of itself quicken (for what more is there in Him That is God by Nature?) yet will it not be conceived of in Christ as Alone and by Itself: for it has united to it the Word, Which is by Nature Life. When therefore Christ calls it life-giving, He does not testify the Power of quickening to It so much, as to Himself, or to His Spirit. For because of Him is His Own Body too Life-giving, since He re-elemented It to His Own Power. But the 'how,' is neither to be apprehended by the mind, nor spoken by the tongue, but honoured in silence and faith above understanding.
But that the Son too is often called by the name of Spirit by the God-inspired Scriptures, we shall know by what is subjoined. The blessed John then writes of Him, This is He That came by water and Spirit, Jesus Christ, not by water only, but by water and the Spirit 5: and it is the Spirit That beareth witness, because the Spirit is truth. Lo, he calleth the Spirit Truth, albeit Christ openly crieth out, I am the Truth. Paul again writes to us saying, They that are in the flesh cannot please God: but YE are not in the flesh, but in the Spirit, if so be that the Spirit of God dwelleth in you, but if any man have not the Spirit of Christ, he is not His. But if Christ be in you, the body is dead because of sin, the Spirit is life because of righteousness. Lo again herein having proved that the Spirit of God dwelleth in us, he hath said that Christ Himself is in us. For inseparable from the Son is His Spirit, according to the count of Identity of Nature, even though He be conceived of as having a Personal Existence. Therefore He often names indifferently, sometimes the Spirit, sometimes Himself.
