But who do you say that I am? Here Christ distinguishes his disciples from the rest of the crowd, to make it more fully evident that, whatever differences may exist among others, we at least ought not to be led aside from the unity of faith. They who shall honestly submit to Christ, and shall not attempt to mix with the Gospel any inventions of their own brain, will never want the true light. But here the greatest vigilance is necessary, that, though the whole world may be carried away by its own inventions, believers may continually adhere to Christ. As Satan could not rob the Jews of the conviction which they derived from the Law and the Prophets, that Christ would come, he changed him into various shapes, and, as it were, cut him in pieces. His next scheme was, to bring forward many pretended Christs, that they might lose sight of the true Redeemer. By similar contrivances, he continued ever afterwards either to tear Christ in pieces, or to exhibit him under a false character. Among the confused and discordant voices of the world, let this voice of Christ perpetually sound in our ears, which calls us away from unsettled and wavering men, that we may not follow the multitude, and that our faith may not be tossed about amongst the billows of contending opinions.

He saith unto them, but whom say ye that I am? Without taking any further notice, or making any reflections on the different sentiments of men concerning him, he put this question to his disciples, and which is what he had chiefly in view, that he might have their sense of him; and which he puts in a different form, and leaves out the phrase, the son of man, because they knew he was more than a man: nor was his mean appearance an offence to them; they had believed in him, became his disciples, and were followers of him: but it was not enough to believe in him, they must confess him; both are necessary: therefore he does not say, whom believe ye, but whom say ye that I am? You who have been with me so long from the beginning; you who have heard so many discourses from me, and have seen so many miracles wrought by me; and who are to be the teachers of others, to preach my Gospel, and publish my salvation to Jews and Gentiles, what have you to say of me? Whom do you say I am? as for those men, it is no great matter who they say I am; but of great moment and consequence are your sense and confession of me. Such who have long sat under a Gospel ministry, or who have been long in the church and school of Christ, it is expected of them, that they should know more of Christ than others; and should be come to a point about his person and office, and be ready to make a confession of their faith, and give a reason of their hope in him; and especially such who are, or are to be preachers of Christ to others: these ought to be well acquainted with him, who, and what he is; they should have no doubt, nor hesitation in their minds, about him, but be fully satisfied concerning him; and be free, and open, and ready to declare what they know and believe of him.

He saith unto them, But whom--rather, "who."
say ye that I am?--He had never put this question before, but the crisis He was reaching made it fitting that He should now have it from them. We may suppose this to be one of those moments of which the prophet says, in His name, "Then I said, I have labored in vain; I have spent my strength for naught, and in vain" (Isaiah 49:4): Lo, these three years I come seeking fruit on this fig tree; and what is it? As the result of all, I am taken for John the Baptist, for Elias, for Jeremias, for one of the prophets. Yet some there are that have beheld My glory, the glory as of the Only-begotten of the Father, and I shall hear their voice, for it is sweet.

But whom say ye that I am? This is the great and smaller catechism, the one great and essential question. Christ is the one object of the Christian's faith. We say we believe in him; but in whom do we believe? The hour had not come for the settlement of what should constitute the Christian confession.