Book excerpt: It's no secret that men and women are different. And it's no secret that they don't always get along because of these differences, even when they love each other. But having a successful marriage is not about finding the perfect person to marry. It's about loving someone in an unselfish, Christlike manner. Whatever we want out of marriage--unconditional love, forgiveness, passion--that is what we have to give to our spouse. Rick Johnson shows couples how to go beyond merely tolerating each other's differences to using those God-given differences to add spice and passion to their relationship.