4. That when the hour cometh, you may remember. He repeats what he had already said, that this is not a philosophy fitted only for a season of leisure, but that it is adapted to practice and use, and that he now discourses on these matters, that they may actually demonstrate that they have not been taught in vain. When he says, that you may remember, he enjoins them, first, to lay up in their minds what they have heard; secondly, to remember them, when they shall be required to put them in practice; and, lastly, he declares that no small importance attaches to the fact, that he utters predictions of future events.
And I told you not these things at the beginning. As the apostles were still weak and tender, so long as Christ conversed with them in the flesh, their singularly good and indulgent Master spared them, and did not suffer them to be urged beyond what they were able to bear. At that time, therefore, they had no great need of confirmation, while they enjoyed leisure and freedom from persecution; but now he tells them that they must change their mode of life, and as a new condition awaits them, he likewise exhorts them to prepare for a conflict.