Biblical explanation
Paul says that a believer who is free to marry should marry “only in the Lord” (). The principle of not being unequally yoked also warns against binding partnerships in which loyalty to Christ pulls one person in a direction the other cannot share (). The Old Testament similarly warned Israel against marriages that would turn hearts away from God. This counsel is not a claim that unbelievers have less human value; it recognizes that marriage shapes daily priorities, finances, community, worship, and the raising of children. A Christian considering marriage should look beyond present affection and honestly evaluate shared allegiance to Christ. If someone is already married to an unbelieving spouse who is willing to remain, Paul counsels faithfulness rather than divorce ().
In brief
Paul says that a believer who is free to marry should marry “only in the Lord” ().
Bible references
Go deeper into this topic God's Design for Marriage and Family Start the studyThis answer is written and reviewed by the Word Oasis Editorial Team, and is presented with supporting references so you can examine each passage in context. If you notice an error or unclear statement, please suggest a correction.