John 16:6

"But because I have said these things unto you," He adds, "sorrow hath filled your heart." He saw, indeed, what effect these words of His were producing in their hearts; for having not yet within them the spiritual consolation, which they were afterwards to have by the Holy Spirit, what they still saw objectively in Christ they were afraid of losing; and because they could have no doubt they were about to lose Him whose announcements were always true, their human feelings were saddened, because their carnal view of Him was to be left a blank. But He knew what was most expedient for them, because that inward sight, wherewith the Holy Spirit was yet to comfort them, was undoubtedly superior; not by bringing a human body into the bodies of those who saw, but by infusing Himself into the hearts of those who believed.

(Tr. xciv) But our Lord saw what effect His words would produce upon their minds. Not having yet that inward consolation which the Holy Ghost was to impart, they were afraid to lose the outward presence of Christ, and so, when they could no longer doubt from His own words that they were going to lose Him, their human affections were saddened, for the loss of their visible object. Wherefore it follows; But because I have said these things unto you, sorrow hath filled your heart.

Great is the tyranny of despondency, and much courage do we need so as to stand manfully against the feeling, and after gathering from it what is useful, to let the superfluous go. It hath somewhat useful; for when we ourselves or others sin, then only is it good to grieve; but when we fall into human vicissitudes, then despondency is useless. And now when it has overthrown the disciples who were not yet perfect, see how Christ raiseth them again by His rebuke. They who before this had asked Him ten thousand questions, (for Peter said, "Whither goest Thou?"; and Thomas, "We know not whither Thou goest, and how can we know the way?"; and Philip, "Show us Thy Father";) these men, I say, now hearing, "they will put you out of the synagogues," and "will hate you," and "whosoever killeth you will think that he doeth God service," were so cast down as to be struck dumb, so that they spake nothing to Him. This then He maketh a reproach to them, and saith, "These things I said not unto you at the beginning, because I was with you; but now I go unto Him that sent Me, and none of you asketh Me, Whither goest Thou? but because I have said these things unto you, sorrow hath filled your heart." For a dreadful thing is immoderate sorrow, dreadful and effective of death.

"But now I go to Him that sent Me, and no man of you saith, Whither goest Thou? But because I have said these things unto you, sorrow hath filled your heart." It was no slight comfort to them to learn that He knew the excess of their despondency. For they were beside themselves from the anguish caused by their being left by Him, and from their awaiting the terrible things which were to come, since they knew not whether they should be able to bear them manfully. "Why then after this did He not tell them that they had been vouchsafed the Spirit?" That thou mightest learn that they were exceedingly virtuous. For if, when they had not yet been vouchsafed the Spirit, they started not back, though overwhelmed with sorrow, consider what sort of men they were likely to be after having enjoyed the grace. If they had heard this at that time, and so had endured, we should have attributed the whole to the Spirit, but now it is entirely the fruit of their own state of mind, it is a clear manifestation of their love for Christ, who applieth a touchstone to their mind as yet defenseless.