He said this so that they would not think that God would glorify Him in such a way that He would no longer be joined to them in earthly fellowship. "Yet a little while I am with you," He said. It is as though He were saying, "Although I shall be glorified in My approaching Resurrection, I shall not immediately ascend into heaven. Yet a little while I am with you."
As it is written in the Acts of the Apostles, after the Resurrection He spent forty days with them (cf. Acts 1:3). He came and went, ate and drank. He had no need of food and drink, yet by this He showed that His flesh was so true that, though no longer needing to eat and drink, it possessed the power to do so.
What then? Was He referring to those forty days when He said, "Yet a little while I am with you," or to something else? It may also be understood thus: "Yet a little while I am with you," that is, "I am still, like you, in this weakness of the flesh." This would mean until He died and rose again. After He rose, although, as was said, He remained with them forty days in the full manifestation of bodily presence, He was nevertheless not with them in fellowship of human weakness.
There is also His other, divine presence, inaccessible to human senses. Of this He said, "I am with you always, even to the end of the age" (Mt 28:20). This is surely not the same as, "Yet a little while I am with you," for "a little while" is not "to the end of the age."
Even if one takes it so, since time flies, and in the sight of God a thousand years are like one day, or like a watch in the night (cf. Ps 89:5), we should still not think that this presence is meant here. This is especially clear because He immediately adds, "You will seek Me, and as I said to the Jews, Where I go you cannot come. So now I say to you" (cf. Jn 13:33).
That is, after this little while during which I am with you, you will seek Me, and where I go, you cannot come. But after the end of the age, will they be unable to come where He goes? What then will He mean when, a little later in His discourse, He says, "Father, I desire that they also, whom You have given Me, may be with Me where I am" (Jn 17:24)?
Thus, "Yet a little while I am with you" is not spoken of that presence by which He will be with them until the end of the age. It is spoken either of the mortal weakness in which He is with them until His Passion, or of the bodily presence in which He will be with them until His Ascension. Whoever chooses either of these two explanations will not contradict the faith.
Yet lest someone think that what we have said is not true, let him consider the Lord's own words after the Resurrection in another Evangelist. We said that the Lord could have referred to fellowship in mortal flesh, in which He remained with the disciples until the Passion, when He said, "Yet a little while I am with you." After the Resurrection He said, "These are the words which I spoke to you while I was still with you" (Lk 24:44). This was said as though at that moment He were not with those who stood beside Him, saw Him, touched Him, and spoke with Him.
What then does "while I was still with you" mean, if not this: "While I was in mortal flesh, in which you remain"? For then, although He had risen in the same flesh, He was no longer with them in the same mortality.
There He was already clothed in the immortality of the flesh, and truly said, "while I was still with you." We can see no other meaning than. "when I was still with you in the mortality of the flesh." So here also it should not be taken strangely that He said, "Yet a little while I am with you." It is as though He said, "Yet a little while I am mortal, as you are mortal."
Let us now consider the words that follow. "You will seek Me, and as I said to the Jews, Where I go, you cannot come, so now I say to you." That is, "now you cannot." When He said this to the Jews, He did not add "now." Therefore those apostles could not then come where He would go, but afterward they would be able. He said this very clearly a little later to the Apostle Peter. For when Peter said, "Lord, where are You going?" He answered, "Where I am going, you cannot follow Me now, but you shall follow Me afterward" (Jn 13:36).
We must not negligently pass over what this means. Where, then, were the disciples unable to follow the Lord at that time, though they could later? If we say that He speaks of death, can there be found any time for a man who has been born when he cannot die? Such is the lot of mankind in this passing body. It is far easier to meet death than it was to receive life.
Therefore at that time they were not less able to follow the Lord to death. Rather, they were less able to follow the Lord to life, which has no death. For the Lord was going where, having risen from the dead, He dies no more, and death no longer has dominion over Him (cf. Rom 6:9).
How indeed could they already then follow the Lord, who was ready to die for righteousness, if they were not yet mature for martyrdom? Or how could they already then follow the Lord, who was going to the immortality of the flesh, if they could die at any time, but rise only at the end of the age? Or how could they already then follow the Lord, who, without intending to abandon them, was going to the bosom of the Father, from which He had not departed when He came to them? No one can be in that blessedness except one perfected in love.
Therefore, teaching how they might become able to go where He would go before them, He said, "A new commandment I give to you, that you love one another" (Jn 13:34). These are the steps by which one must follow Christ. But we must defer a fuller discourse on them to another time.