Oftentimes Christians will want to or will marry unbelievers and ask, “Is this okay?” Throughout the OT are found Scriptures which forbid Israelites to marry foreigners, but some NT Believers disavow the OT. However, The Old Testament is not negated in the New. Although the following verse is not directly addressing marriage, Paul is speaking to relationships between Believers and unbelievers.
“Do not become partners with those who do not believe, for what partnership is there between righteousness and lawlessness, or what fellowship does light have with darkness? 15 And what agreement does Christ have with Beliar? Or what does a believer share in common with an unbeliever? 16 And what mutual agreement does the temple of God have with idols? For we are the temple of the living God, just as God said, “I will live in them and will walk among them, and I will be their God, and they will be my people.” 17 Therefore “come out from their midst, and be separate,” says the Lord, “and touch no unclean thing, and I will welcome you, 18 and I will be a father to you, and you will be my sons and daughters,” says the All-Powerful Lord.” 2 Corinthians 6:14-18 NET2.
This word from the Apostle, inspired of the Holy Spirit is quite clear, is it not? He asks, “What fellowship does light have with darkness?” Every Believer knows the answer, “None.” For anyone wanting to marry an unbeliever, my suggestion is to ask the Lord because you may not like my answer.
Jesus is Lord.