Marriage isn't difficult because you don't know who you are, says Crabb. It's difficult because you don't know who your partner is---and you don't care. ''Entirely reasonable'' selfcenteredness by both partners must be replaced by repentance that leads to other-centeredness. Underscoring the biblical meanings of masculinity and femininity, Crabb points out crucial differences between male other-centeredness and female other-centeredness. And he emerges with a provocative new understanding of how men and women, married and single, can build satisfying relationships.