In the New Testament a totally new concept of marriage is being introduced; it is directly dependent upon the "Good News" of the Resurrection which was brought to Christ. A Christian is called--already in this world--to experience new life, to become a citizen of the Kingdom; and he can do so in marriage. But then marriage ceases to be either a simple satisfaction of temporary natural urges, or a means for securing an illusory survival through posterity. It is a unique union of two beings in love, two beings who can transcend their own humanity and thus be united not only "with each other," but also "in Christ."
JOHN MEYENDORFF, Marriage: An Orthodox Perspective