Marriage is the unique Sacrament which binds one man and one woman together in a covenant under God and His Church. It is a Sacrament of vocation, a response to a specific calling that God has placed in the hearts of a couple. It is a bond that lasts for life which is permanent, faithful, and fruitful. Marriage is not just about two people, but is the foundation of the family, the "domestic church," the most basic and foundational structure, not only for the Church, but for all of society.