Jerome
Catena Aurea · Matthäusevangelium 24
Watch therefore: for ye know not what hour your Lord doth come. But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up. Therefore be ye also ready: for in such an hour as ye think not the Son of Man cometh.
Having declared that of that hour knoweth no man, but the Father only, He shews that it was not expedient for the Apostles to know, that being ignorant they might live in perpetual expectation of His coming, and thus concluding the whole, He says, Watch therefore, &c. And He does not say, ‘Because we know not,’ but Because ye know not, shewing that He Himself is not ignorant of the day of judgment.