Matthew 16:20

Seeing Peter had confessed Him to be Christ the Son of the living God, because He would not have them preach this in the mean time, He adds, Then charged he his disciples that they should tell no man that he was Jesus the Christ. Or they then spake of Him in lowly words, as only a great and wonderful man, but as yet proclaimed Him not as the Christ. Yet if any will have it that He was even at the first proclaimed to be Christ, he may say that now He chose that first short announcement of His name to be left in silence and not repeated, that that little which they had heard concerning Christ might be digested into their minds. Or the difficulty may be solved thus: that the former relation concerning their preaching Christ does not belong to the time before His Resurrection, but to the time that should be after the Resurrection; and that the command now given is meant for the time present; for it were of no use to preach Him, and to be silent concerning His cross. Moreover, He commanded them that they should tell no man that He was the Christ, and prepared them that they should afterwards say that He was Christ who was crucified, and who rose again from the dead.

For what having once had root has afterwards been torn up, if it is again planted, is with difficulty retained among the multitude; but what having been once rooted has continued ever after unmoved, is easily brought on to a further growth. He therefore dwells on these sorrowful things, and repeats His discourse upon them, that He may open the minds of His disciples.

And then, when He had so said, "He charged them that they should tell no man that He was the Christ." 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 hath been once rooted and then plucked up, would hardly, if planted, again be retained among the many; but that which, once fixed, hath remained immovable, and hath 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 ye cannot bear them now;" 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 thee 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," saith He, "but ye 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.

When then above He sends His disciples to preach, and commands them to proclaim His advent, this seems contrary to His command here, that they should not say that He is Jesus the Christ. To me it seems that it is one thing to preach Christ, and another to preach Jesus the Christ. Christ is a common title of dignity, Jesus the proper name of the Saviour. But that none should suppose that this is only my explanation, and not an evangelic interpretation, what follows explains the reasons of His forbidding them to preach Him at that time; Then began Jesus to show unto his disciples that he must needs go unto Jerusalem, and suffer many things of the elders and Scribes, and Chief Priests, and be put to death, and rise again the third day. The meaning is; Then preach Me when I shall have suffered these things, for it will be of no avail that Christ be preached publicly, and His Majesty spread abroad among the people, when after a little time they shall see Him scourged and crucified.