Part of the Mystery of Christ
Christianity believes that marriage is part of the Mystery of Christ and it shares in the depth of meaning of His saving action in the world. It is important to consider what God (according to Christianity) meant marriage to be, and from this to see how the union of man and woman is marvelously transformed when it is drawn into His Plan of Salvation in Christ.
Marriage is a Sacrament
In Christianity, marriage is a sacrament: it is the Holy Spirit Who makes it work. So it has to be approached in a different way, with real spiritual depth.
Marriage Between Man and Woman Reflects Man and Christ
It is known through the light of Faith. It confirms and seals the deepest instincts that men have always had: we are made for community, for fidelity, for love. A presentation of Christian Marriage must first be Christian: it must be bathed in the light of Christ; it cannot be an exercise in psychology or sociology or any natural science, alone.
Christianity does not permit polygamy, i.e. getting married to more than one partner. monogamy, or the law of one wife, is definite in Christianity and established in the Bible.
Sex and Marriage
Before the wedding, Chrisitianity would urge the couple to ask the Lord for the grace to preserve the power of sex for the framework of marriage. To misuse sex to indulge in full bodily union outside of marriage is called “fornication”. The couple is urged to pray for the grace to avoid it even if everyone around them takes it very lightly.
God means the marriage, the resulting family, the home to be an earthly preview of what heaven will be: a community of persons in glory gathered around the Ultimate Community of Father, Son and Holy Spirit in which all are radiant with the same Light that comes from Them.
Permanence and Unity
A presentation of Christian Marriage does not reject the natural order but transcends and crowns it. Faith gives the natural its true dimension: creation is to be transformed in New Creation of the Risen Christ.
The rationale that Christianity uses for permanence and unity and fidelity in the fabric of Christian Marriage comes from Revelation. It is known through the light of Faith. It confirms and seals the deepest instincts that men have always had: we are made for community, for fidelity, and for love.