Packer on Evangelistic Sermons

From Evangelism and the Sovereignty of God:

It is a mistake to suppose that evangelistic sermons are a special brand of sermons, having their own peculiar style and conventions; evangelistic sermons are just scriptural sermons, the sort of sermons that a man cannot help preaching if he is preaching the Bible biblically. Proper sermons seek to expound and apply what is in the Bible. But what is in the Bible is just the whole counsel of God for man's salvation; all Scripture bears witness, in one way or another, to Christ, and all biblical themes relate to him. All proper sermons, therefore, will of necessity declare Christ in some fashion and so be more or less directly evangelistic. Some sermons, of course, will aim more narrowly and exclusively at converting sinners than do others. But you cannot present the Lord Jesus Christ as the Bible presents him, as God's answer to every problem in the sinner's relationship with himself, and not be in effect evangelistic all the time.