While there are many New Testament passages that make it clear that God assumes Christians know they should only date Christians, such as 1 Corinthians 7:39, 9:5; the clearest passage about this command of God is found in 2 Corinthians 6:14-18. In his loving yet biblical way, Mackintosh warns about Satan's trap of being married to a non-Christian and points out that God's love is always available for his own children caught in this trap.