But when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will show you things to come.
All Commentaries on John 16:13 Go To John 16
Cyril of Alexandria
AD 444
He found their sorrow increased by their knowledge of the future, and that they were ill-disposed to bear the coming evils. For sorrow, He says, hath filled your heart. And He thought that it would not be meet to dispirit them by adding the rest, but He buries as it were in timely silence what He had to say next, as likely to cause them no small alarm, and reserves what remained for them to know, for the revelation through the Spirit, and for the light that was to be given them at the fitting season 1. And perhaps also, seeing the disciples slow to apprehend the mystery, because they had not yet been illuminated by the Spirit, nor become partakers of the Divine Nature: For the Holy Spirit was not yet given, because Christ was not yet glorified, as the holy Evangelist says, He speaks thus, wishing to suggest to them that He would hereafter be able to reveal mysteries exceeding deep and passing man's understanding, while at present He refuses to do this, and with good reason, because He says that they are not yet prepared for it. For when, He says, My Holy Spirit shall transform you and change the elements of your mind into a willingness and an ability to despise the types of the Law, and rather to prefer the beauty of spiritual service, and to honour the reality more than the shadow; then, He says, you will surely be able readily to understand the things concerning Me. For the complete expression of these things will find place in your hearts when you are well fitted to receive it.
One might suppose then that our Lord thought He ought thus to address His disciples. For what He once said as by way of illustration is of a piece with, and will fit in with, the meaning we have just given to His words: No man rendeth a piece from a new garment and putteth it upon an old garment; and again: But neither do men put new wine into old wine-skins; else the skins burst, and the wine is spilled. But new wine must be put into new wine-skins. For the new instruction of the Gospel message belongs not to those who are not yet moulded by the Spirit into newness of life and knowledge, and they cannot as yet contain the mysteries of the Holy Trinity. The exposition then of the deeper mysteries of the faith is suitably reserved for the spiritual renovation that was to proceed from the Spirit when the mind of those who believed on Christ would no longer allow them to remain in the obsolete letter of the Law but rather induce their conversion to new doctrines and implant in them thoughts enabling them to see a fair vision of the truth. And that before the Resurrection of our Saviour Christ from the dead, and before partaking of His Spirit, the disciples were living too much after the manner of the Jews, and were clinging to the legal dispensation, even though the mystery of Christ was clearly superior to it, one might very readily perceive. And therefore the blessed Peter, even though he was pre-eminent among the holy disciples, when the Saviour was once setting forth His suffering on the Cross and telling them that He must be outraged by the insults of the Jews, rebuked Him, saying, Be it far from Thee, Lord; this shall never be unto Thee. And yet the holy prophets had plainly declared not only that He would suffer, but also the nature and extent of what He would endure. And let us also examine this further consideration. For when, as is recorded and as we read in the Acts of the Apostles, Peter was hungry and desired to eat, and when he saw thereupon the sheet let down by four corners from heaven, in which were included all creatures of the earth and the sea and the air, and heard a voice from heaven, saying, Rise, Peter, kill and eat; he answered, Not so, Lord; for I have never eaten anything that is common or unclean; and for this received a well-merited rebuke in the answer: What God hath cleansed, make not thou common. And yet he ought to have remembered the frequent statement of our Saviour to the Jews: Not that which entereth into the mouth defileth the man. See then what need there was in his case for the illumination of the Spirit. Do you perceive then that it was necessary that his temper of mind should be forged anew into another better and wiser than that which was in the Jews? And therefore when, by being enriched with the grace that is from above and from heaven, they had their strength renewed, according to the Scripture, and had attained to a better knowledge than before, then we hear them boldly saying: But we have the mind of Christ. By the Mind of Christ they mean nothing else but the advent of the Holy Spirit into their hearts, revealing unto them in due measure all things whatsoever they ought to know and learn.
When then "He," that is the Comforter, the Spirit of Truth, is come, He shall guide you into all the truth. See how free from extravagance the expression is: note the soberness of the phrase. For having told them that the Comforter would come unto them, He called Him the Spirit of Truth, that is, His own Spirit. For He is the Truth. For that His disciples might know that He does not promise them the visitation of a foreign and strange power, but rather that He will vouchsafe unto them His Presence in another form, He calls the Comforter the Spirit of Truth, that is, His own Spirit. For the Holy Spirit is not in truth alien from the Substance of the Only-begotten, but proceeds naturally from it, having no separate existence from Him so far as identity of nature is concerned, even though He may be in some sort conceived of as having a separate existence. The Spirit of Truth then, He says, will lead you to complete knowledge of the truth. For as having perfect knowledge of the truth, of which He is also the Spirit, He will make no partial revelation of it to those who worship Him, but will rather engraft in their hearts the mystery concerning it in its entirety. For even if now we know in part, as Paul says, still, though our knowledge be limited, the fair vision of the truth has gleamed upon us entire and undefiled. As then no man knoweth the things of a man, according to the Scripture, save the spirit of the man which is in him, in the same way, I think, to use the words of Paul, none knoweth the things of God save the Spirit of God which is in Him.
When then He cometh, He says, He shall not speak from Himself (He does not say, He will make you wise, and will reveal to you the mystery of the truth); He will tell you nothing that is not in accord with My teaching, nor will He expound to you any strange doctrine, for He will not introduce laws peculiar to Himself; but since He is My Spirit, and as it were My Mind, He will surely speak to you of the things concerning Me. And this the Saviour saith, not that we should suppose that the Holy Spirit has merely ministerial functions, as some ignorantly maintain, but rather from a wish to satisfy the disciples that His Spirit, not being separate from Him so far as identity of Substance is concerned, will surely speak the things concerning Him, and will work and purpose the same.
And for this reason He added the words, and He will show you things to come; and it is almost as though He said these very words, "This will be a sign unto you that the Spirit is in very truth of My Substance and as it were My Mind----His telling you things to come, as I have done. For I foretold, even though you have not been able to take everything to heart. He would not then foretell things to come, as I have done, if He did not indeed exist in Me and proceed through Me, and if He were not Consubstantial with Me."