John 17:23

"I in them, and Thou in Me." "How gave He the glory?" By being in them, and having the Father with Him, so as to weld them together. But in another place He speaketh not so; He saith not that the Father cometh by Him, but, "that He and the Father come, and take up their abode with him," "there" removing the suspicion of Sabellius, "here" that of Arius.

"That they may be made perfect in one, and that the world may know that Thou hast sent Me." He saith these latter words immediately after the other, to show that peace hath more power to attract men than a miracle; for as it is the nature of strife to separate, so it is that of agreement to weld together. "And I have loved them as Thou hast loved Me." Here again the "as" means, as far as it is possible for a man to be loved; and the sure proof of His love is His giving Himself for them. After having told them that they shall be in safety, that they shall not be overturned, that they shall be holy, that many shall believe through them, that they shall enjoy great glory, that not He alone loved them, but the Father also; He next telleth them of what shall be after their sojourning here, concerning the prizes and crowns laid up for them.

And then He added: "I in them, and Thou in me, that they may be made perfect in one." Here He briefly intimated Himself as the Mediator between God and men. Nor was this said in any such way as if the Father were not in us, or we were not in the Father; since He had also said in another place, "We will come unto him, and make our abode with him;" and a little before in this present passage He had not said, "I in them and Thou in me," as He said now; or, They in me, and I in Thee; but, "Thou in me, and I in Thee, and they in us." Accordingly, when He now says, "I in them, and Thou in me," the words take this form in reference to the person of the Mediator, like that other expression used by the apostle, "Ye are Christ's, and Christ is God's." But in adding, "That they may be made perfect in one," He showed that the reconciliation, which is effected by the Mediator, is carried to the very length of bringing us to the enjoyment of that perfect blessedness, which is thenceforth incapable of further addition. Hence the words that follow, "That the world may know that Thou hast sent me," are not, I think, to be taken as if He had again said, "That the world may believe;" for sometimes, to know, is also used in the same sense as to believe, as it is in the words He uttered some time before: "And they have known truly that I came out from Thee, and they have believed that Thou didst send me." He expressed the same thing by the later words, "they have believed," as He had done by the earlier, "they have known." But inasmuch as He here speaks of the consummation, the knowledge must be taken for such, as it shall then be by sight, and not, as it now is, by faith. For an order seems to have been preserved in reference to what He said a little before, "that the world may believe;" while here it is, "that the world may know." For although He said there, "that they all may be one," and "may be one in us," yet He did not say, "they may be made perfect in one," and so subjoined the words, "that the world may believe that Thou hast sent me;" but here He said, "That they may be made perfect in one," and then added, not, "that the world may believe," but, "that the world may know that Thou hast sent me." For so long as we believe what we do not see, we are not yet made perfect, as we shall be when we have merited the sight of that which we believe. Most correctly, therefore, did He say in that previous place, "That the world may believe," and here "That the world may know;" yet both there and here, "that Thou hast sent me;" that we may know, so far as belongs to the inseparable love of the Father and the Son, that at present we only believe what we are on the way, by believing, to know.

And had He said, That they may know that Thou hast sent me, it would be just of the same force as what He actually does say, "that the world may know." For they are the world that abideth not in enmity, as doth the world that is foreordained to damnation; but one that out of an enemy has been transformed into a friend, and on whose account "God was in Christ reconciling the world unto Himself." Therefore said He, "I in them, and Thou in me;" as if He had said, I in those to whom Thou hast sent me; and Thou in me, reconciling the world unto Thyself through me. In close relation to these come also His further words: "And Thou hast loved them as Thou hast loved me." That is to say, in the Son the Father loveth us, because in Him He hath chosen us before the foundation of the world. For He who loveth the Only-begotten, certainly loveth also His members which, through His instrumentality, He engrafted into Him by adoption. But we are not on this account equal to the only-begotten Son, by whom we have been created and re-created, that it is said, "Thou hast loved them as [Thou hast] also [loved] me." For one does not always intimate equality when he says, As this, so also that other; but sometimes only, Because this is, so also is the other; or, That the one is, in order that the other may be also. For who could say that the apostles were sent by Christ into the world in exactly the same way as He Himself was sent by the Father? For, to say nothing of other differences, which it would be tedious to mention, they at all events were sent when they were already men; but He was sent in order that He might be man; and yet He said above, "As Thou hast sent me into the world, even so have I sent them into the world;" as if He had said, Because Thou hast sent me, I have sent them. So also in the passage before us He says, "Thou hast loved them, as Thou hast loved me;" which is nothing else than this, Thou hast loved them because that Thou hast also loved me. For He could not but love the members of the Son, seeing that He loveth the Son Himself; nor is there any other reason for loving His members, save that He loveth Himself. But He loveth the Son as regards His Godhead, because He begat Him equal with Himself; He loveth Him also in regard to what He is as man, because the Only-begotten Word was Himself made flesh, and on account of the Word is the flesh of the Word dear to Him; but He loveth us, inasmuch as we are the members of Him whom He loveth; and in order that we might be so, He loved us on this account before we existed.

The love, therefore, wherewith God loveth, is incomprehensible and immutable. For it was not from the time that we were reconciled unto Him by the blood of His Son that He began to love us; but He did so before the foundation of the world, that we also might be His sons along with His Only-begotten, before as yet we had any existence of our own. Let not the fact, then, of our having been reconciled unto God through the death of His Son be so listened to or so understood, as if the Son reconciled us to Him in this respect, that He now began to love those whom He formerly hated, in the same way as enemy is reconciled to enemy, so that thereafter they become friends, and mutual love takes the place of their mutual hatred; but we were reconciled unto Him who already loved us, but with whom we were at enmity because of our sin. Whether I say the truth on this, let the apostle testify, when he says: "God commendeth His love toward us, in that, while we were yet sinners, Christ died for us." He, therefore, had love toward us even when we were practising enmity against Him and working iniquity; and yet to Him it is said with perfect truth, "Thou hatest, O Lord, all workers of iniquity." Accordingly, in a wonderful and divine manner, even when He hated us, He loved us; for He hated us, in so far as we were not what He Himself had made; and because our own iniquity had not in every part consumed His work, He knew at once both how, in each of us, to hate what we had done, and to love what He had done.