Christians should not marry nonbelievers. It just won't work, says Kathy Keller, wife of well-known pastor Tim Keller of Redeemer Presbyterian Church.

The Kellers have dealt often with relationships between Christians and non-Christians. But rather than lecture couples on all the biblical reasons why marriage would be unwise, Mrs. Keller said it would be easier to let those already married to unbelievers do the talking.