The Augsburg Confession Article V

Article V: Of the Ministry.

That we may obtain this faith, the Ministry of Teaching the Gospel and administering the Sacraments was instituted. For through the Word and Sacraments, as through instruments, the Holy Ghost is given, who works faith; where and when it pleases God, in them that hear the Gospel, to wit, that God, not for our own merits, but for Christ's sake, justifies those who believe that they are received into grace for Christ's sake.

They condemn the Anabaptists and others who think that the Holy Ghost comes to men without the external Word, through their own preparations and works.