Charles Spurgeon is one of the most famous and most effective preachers in the last 300 years. Why? Because he made Jesus Christ the central focus. And this is why it is so important to proclaim Jesus Christ at the center of preaching, teaching, and worship. A Christ-centered message is the only message that the apostles ever preached. A Christ-less sermon is reduced to a chat session. It is nothing more than a real good, feel good message that has no long lasting impact. If there's a mist behind the pulpit, there's a fog in the pew.
Leave Christ out of the preaching and you shall do nothing. Only advertise it all over London, Mr. Baker, that you are making bread without flour; put it in every paper, “Bread without flour” and you may soon shut up your shop, for your customers will hurry off to other tradesmen. . . . A sermon without Christ as its beginning, middle, and end is a mistake in conception and a crime in execution. However grand the language it will be merely much-ado-about-nothing if Christ be not there. And I mean by Christ not merely his example and the ethical precepts of his teaching, but his atoning blood, his wondrous satisfaction made for human sin, and the grand doctrine of “believe and live.” [sermon: “Christ the Glory of His People” (3/22/1868)]
I know one who said I was always on the old string, and he would come and hear me no more; but if I preached a sermon without Christ in it, he would come. Ah, he will never come while this tongue moves, for a sermon without Christ in it—a Christless sermon! A brook without water; a cloud without rain; a well which mocks the traveler; a tree twice dead, plucked up by the root; a sky without a sun; a night without a star. It were a realm of death—a place of mourning for angels and laughter for devils. O Christian, we must have Christ! Do see to it that every day when you wake you give a fresh savor of Christ upon you by contemplating his person. Live all the day, trying as much as lieth in you, to season your hearts with him, and then at night, lie down with him upon your tongue. [sermon: “A Bundle of Myrrh” (3/6/1864)]
What was the subject? What was Peter preaching upon? He was preaching Christ and him crucified. No other subject ever does produce such effects as this. The Spirit of God bears no witness to Christless sermons. Leave Jesus out of your preaching, and the Holy Spirit will never come upon you. Why should he? Has he not come on purpose that he may testify of Christ? Did not Jesus say, “He shall glorify me: for he shall receive of mine, and shall shew it unto you”? Yes, the subject was Christ, and nothing but Christ, and such is the teaching which the Spirit of God will own. Be it ours never to wander from this central point: may we determine to know nothing among men but Christ and his cross. [sermon: “The Mediator, Judge, and Savior” (5/30/1880)]
For more on Jesus Christ and the significance of His blood I encourage you to read Hebrews 9:11-22 through 10:4-7. Its all about Jesus Christ and Him crucified.