Charles Spurgeon in his sermon “Apostolic Exhortation,” explained the necessity of preaching Christ. Note especially what he says about the time when Peter preached Christ:
It is noteworthy that Peter, in addressing this crowd, came at once to the very essence and bowels of his message. He did not beat the bush; he did not shoot his arrow far afield, but he hit the very centre of the target. He preached not merely the gospel of good news, but Christ, the person of Christ; Christ crucifiedâ€”crucified by them, Christ risen, Christ glorified of his Father. Depend upon it, this is the very strength of the Christian ministry, when it is saturated with the name and person and glory of the Lord Jesus Christ. Take Christ away, and you ungospelise the gospel, you do but pour out husks such as swine do eat, while the precious kernel is removed, seeing you have taken away the person of the Lord Jesus Christ. If there was ever an occasion when a preacher of the gospel might have forgotten to speak of Christ, it was surely the occasion on which Peter spake so boldly of him. For, might it not have been said, “Talk not of Jesus; they have just now haled him to the death: the people are mad against him; preach the truth, but do not mention his name; deliver his doctrine, but withhold the mention of his person, for you will excite them to madness; you will put your own life in jeopardy; you will scarcely do good while they are so prejudiced, and you may do much mischief”? But, instead of this, let them rage as they would, Peter would tell them about Jesus Christ, and about nothing else but Jesus Christ. He knew this to be the power of God unto salvation, and he would not flinch from it; so to them, even to them, he delivered the gospel of our Lord Jesus Christ, with a pungency as well as a simplicity scarcely to be rivalled. Notice how he puts it: “Ye” have slain him; “ye” have crucified him; “ye” have preferred a murderer. He is not afraid of being personal; he does not shirk the touching of men’s consciences; he rather thrusts his hand into their hearts and make them feel their sin; he labours to open a window into the darkness of their spirits, to let the light of the Holy Ghost shine into their soul. Even thus, my brethren, when we preach the gospel, must we do: affectionately but graciously must we deal with men. Far hence be all trimming and mincing of matters. Accursed let him be that takes away from the gospel of Jesus Christ that he may win popular applause, or who bates his breath and smooths his tongue that he may please the unholy throng. Such a man may have for a moment the approbation of fools, but, as the Lord his God liveth, he shall be set as a target for the arrows of vengeance in the day when the Lord cometh to judge the nations. Peter, then, boldly and earnestly preached the gospelâ€”preached the Christ of the gospelâ€”preached it personally and directly at the crowd who were gathered around him.