C.f.w. Walther said this quote

Here is where most preachers make their mistake. They are afraid that by preaching the gospel too clearly, it will be their fault if people lapse into sin. They imagine that the gospel is food for the carnal-minded. True enough, to many the gospel does become the smell of death unto death, but that is not the fault of the Gospel. That happens only because men do not accept -do not believe-the Gospel. Faith is not merely thinking, I believe. Your whole heart must be seized by the gospel and come to rest in it. When that happens, you are transformed and cannot help but love and serve God.