Lest I be misunderstood, let me make some things very clear. I am not advocating that we as truly evangelical preachers should imitate Calvinism or so-called “Evangelicalism”. The main use of the law is that which shows us our sin. And the Gospel, not the Law in any of its uses, must predominate in our preaching. Like humane physicians we must stress the diagnosis not for its own sake, but for the sake of the cure, and then concentrate on the glorious treasures of the love of God, poured out upon us so superabundantly in His blessed Son! It is our task to preach the love and joy of God into people’s hearts. But then we must also guide them towards God-pleasing expressions of their responding love for God. And in our non-sacramental age, in which all sorts of sacrament-substitutes flourish, such as alleged tongues and miracles, millennialist fantasies about Middle Eastern places and politics, “purpose-driven” psycho-babble, and the like, we must hold high the glory of the Gospel, which is “the power [dynamis] of God for salvation'” (Romans 1:16). Our preaching needs to serve and communicate the three permanent witnesses on earth, the spirit (or the blessed Gospel words which are spirit and life, St. John 6:63), the water of Holy Baptism, and the Blood of the New Testament, 1 John 5:8. It is through these blessed Gospel-channels that the divine life of faith is transmitted to us sinners.
“The Third Use of the Law in the Formula of Concord”, from “You, My People, Shall Be Holy: A Festschrift in Honour of John W. Kleinig”, pages 122-123