In the other three Evangelists these predictions occur before the supper; John gives them after. Still if they relate them as given very near His Passion, that is enough to explain His saying, These things I said not unto you at the beginning. Matthew however relates these prophecies as given long before His Passion, on the occasion of His choosing the twelve. How do we reconcile this with our Lord’s words? By supposing them to apply to the promise of the Holy Spirit, and the testimony He would give amidst their suffering. This was what He had not told them at the beginning, and that because He was with them, and His presence was a sufficient consolation. But as He was about to depart, it was meet that He should tell them of His coming, by whom the love of God would be shed abroad in their hearts, to preach the word of God with boldness.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tr. xciv. 1