"I believe that those sermons which are fullest of Christ are the most likely to be blessed to the conversion of the hearers.  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."

-Charles H. Spurgeon