Then charged he his disciples that they should tell no man that he was Jesus the Christ.
All Commentaries on Matthew 16:20 Go To Matthew 16
John Chrysostom
AD 407
And why did He charge them? That when the things which offend are taken out of the way, and the cross is accomplished, and the rest of His sufferings fulfilled, and when there is nothing any more to interrupt and disturb the faith of the people in Him, the right opinion concerning Him may be engraven pure and immovable in the mind of the hearers. For, in truth, His power had not yet clearly shone forth. Accordingly it was His will then to be preached by them, when both the plain truth of the facts, and the power of His deeds were pleading in support of the assertions of the apostles. For it was by no means the same thing to see Him in Palestine, now working miracles, and now insulted and persecuted (and especially when the very cross was presently to follow the miracles that were happening); and to behold him everywhere in the world, adored and believed, and no more suffering anything, such as He had suffered.
Therefore He bids them tell no man. For that which has been once rooted and then plucked up, would hardly, if planted, again be retained among the many; but that which, once fixed, has remained immovable, and has suffered injury from no quarter, easily mounts up, and advances to a greater growth.
And if they who had enjoyed the benefit of many miracles, and had had part in so many unutterable mysteries, were offended by the mere hearing of it; or rather not these only, but even the leader of them all, Peter; consider what it was likely the common sort should feel, being first told that He is the Son of God, then seeing Him even crucified and spit upon, and that without knowledge of the secret of those mysteries, or participation in the gift of the Holy Ghost. For if to His disciples He said, I have many things to say unto you, but you cannot bear them now; John 16:12 much more would the rest of the people have utterly failed, had the chiefest of these mysteries been revealed to them before the proper time. Accordingly He forbids them to tell.
And to instruct you how great a thing it was, their afterwards learning His doctrine complete, when the things that offend had passed by; learn it from this same leader of theirs. For this very Peter, he who after so many miracles proved so weak as even to deny Him, and to be in fear of a mean damsel; after the cross had come forth, and he had received the certain proofs of the resurrection, and there was nothing more to offend and trouble him, retained the teaching of the Spirit so immovable, that more vehemently than a lion he sprang upon the people of the Jews, for all the dangers and innumerable deaths which were threatened.
With reason then did He bid them not tell the many before the crucifixion, since not even to them that were to teach did He venture to commit all before the crucifixion. For I have many things to say unto you, says He, but you cannot bear them now.
And of the things too that He did say, they do not understand many, which He did not make plain before the crucifixion. At least when He was risen from the dead, then and not before they knew some of His sayings.