only in the Lord
1 Corinthians 7:39
7:39 only in the Lord. It is always outside of God’s will for a believer to marry an unbeliever (note II Corinthians 6:14). God can forgive sin, of course, including this sin, but such a direct act of disobedience is dangerous. Such marriages more commonly result in the believer backsliding than the unbeliever coming to Christ. Such basic differences should be resolved before marriage, not after.