Let your sermons be full of Christ, from beginning to end crammed full of the gospel. As for myself, brethren, I cannot preach anything else but Christ and His cross, for I know nothing else, and long ago, like the apostle Paul, I determined not to know anything else save Jesus Christ and Him crucified. . . . I have preached the gospel--not about the gospel, but the gospel--the full, free, glorious gospel of the living Christ who is the incarnation of the good news. Preach Jesus Christ, brethren, always and everywhere; and every time you preach be sure to have much of Jesus Christ in the sermon.
You remember the story of the old minister who heard a sermon by a young man, and when he was asked by the preacher what he thought of it he was rather slow to answer, but at last he said, If I must tell you, I did not like it at all; there was no Christ in your sermon.' 'No,' answered the young man, 'because I did not see that Christ was in the text.' 'Oh!' said the old minister, 'but do you not know that from every little town and village and tiny hamlet in England there is a road leading to London? Whenever I get hold of a text, I say to myself, 'There is a road from here to Jesus Christ, and I mean to keep on His track till I get to Him.'
--C. H. Spurgeon, The Soul Winner (Eerdmans 1963), 78