The fourth 'secret word' characterizing a happy marriage is 'teammates.' Each player in the marriage has their own roles which have the possibility of complementing each other. These roles are subject to the three previous principles, that of being friends, partners, and servants to each other. Otherwise, the working out of the roles God has in mind for man and woman could result in great difficulties. But when working properly, teammates in marriage respect each other's gifts and bring the best out of each other.