“Why marry people of faith” is a great question. When Christians get married this is not always something people give much thought to, yet it is very important. When two believers come together a strong foundation can be constructed on the foundation of Jesus Christ. The Apostle Paul gives spiritual insight to why a believer does not want to marry an unbeliever.
2 Corinthians 6:14 Don’t team up with those who are unbelievers. How can righteousness be a partner with wickedness? How can light live with darkness? 15 What harmony can there be between Christ and the devil? How can a believer be a partner with an unbeliever? 16 And what union can there be between God’s temple and idols? For we are the temple of the living God.
Marrying Unbelievers has Consequences
The spiritual lives of the people in Jerusalem were in tatters. They disregarded God’s direction and married people who did not know the Lord. This greatly disturbed Nehemiah. Nehemiah 13:25 So I confronted them and called down curses on them. I beat some of them and pulled out their hair. I made them swear in the name of God that they would not let their children intermarry with the pagan people of the land. 
Spiritual unity is a key to building a strong marriage. A husband, wife, with Jesus in the center is a threefold braid that is not easily broken. Spiritual unity isn’t about giving up who you are but working together to fulfill God’s plan for your marriage. I have found the following areas helpful in my own marriage:
- Praying together.
- Reading Scripture together and discussing it.
- Learning to forgive each other.
Spiritual unity is a foundational element to strengthen your marriage. When your marriage is strong it gives you an opportunity to deepen your relationship with each other and with the Lord. The Apostle Paul gives insight about love in a marriage which grows out of our relationship with Jesus.
1 Corinthians 13: 4 Love is patient and kind. Love is not jealous or boastful or proud 5 or rude. It does not demand its own way. It is not irritable, and it keeps no record of being wronged. 6 It does not rejoice about injustice but rejoices whenever the truth wins out. 7 Love never gives up, never loses faith, is always hopeful, and endures through every circumstance. 
Why marry people of faith? Find the answer here: