Therefore I give you to understand, that no man speaking by the Spirit of God calls Jesus accursed: and that no man can say that Jesus is the Lord, but by the Holy Spirit.
All Commentaries on 1 Corinthians 12:3 Go To 1 Corinthians 12
John Chrysostom
AD 407
If no one can say that Jesus is Lord except by the Spirit, what can we say about those who do name his name but do not have the Spirit? Here we have to understand that Paul was not talking about catechumens who had not yet been baptized but about believers and unbelievers.