In this sermon Mr. Smith begins by asking are the signs you hear about in Pentecostal churches the true signs of God's spirit? Passages such as Mark 16:17 and Acts 2 show that tongues were a sign in the early church. But the miracle was that they spoke languages not known to them, but known to the hearers. In I Cor. 12:29-30 Paul says he wishes everyone had this ability, but the context shows that they did not, so it could not be a required sign of conversion. Speaking in tongues was given as a gift to some to spread the gospel to the Gentiles.