A marriage is a series of friendships. Love serves as its underlying theme. Friendships provide it with the new challenges around which the relationship further develops. Each type of friendship with ones partner comes into being, rises to a peak of enthusiasm, and then wanes away in our cedar chest of sentimental values. Every once in a while we go to the chest and draw out a friendship item to give us a shot in the arm. Then we put it away till another day.