John 16:19

It follows; Now Jesus knew that they were desirous to ask Him, and said unto them, Do ye enquire among yourselves of that I said, A little while, and ye shall not see Me: and again, a little while, and ye shall see Me? Verily, verily, I say unto you, That ye shall weep and lament. Their merciful Master, understanding their ignorance and doubts, replied so as to explain what He had said.

As then they were thirsting for information and sought to know more exactly the meaning of His words, He gives a clearer exposition of His Passion, and vouchsafes them the foreknowledge of the sufferings that He was about to undergo to their great profit. It was not in order that He might engender in them premature alarm that He deemed it meet to give them this explanation beforehand, but in order that, forearmed by their knowledge, they might perchance be found more courageous to withstand the terror that would assail them. For that of which the advent is expected is milder in its approach than that which is wholly unlooked for.

Christ, however, anticipates their desire for information, and once more very seasonably shows them that He knows their hearts as God, and that He is as well aware of what they are turning over in their minds, and what was as yet buried in the depths of their hearts, as though they had already given utterance to it in speech. For what is there which can be hid from Him before Whom all things are naked? Wherefore also He saith to one of the Saints: Who is this that hideth counsel from Me, and putteth together words in his heart and thinketh that he keepeth it secret from Me? He then at every turn uses occasion as it offers to nurture in them secure and unshaken faith.