In Christian marriage, spouses model the love and self-gift of Christ. By giving of themselves and serving one another, their family, and community, they help one another live out Christ’s call to discipleship, love, and service. Marriage provides a foundation for a family committed to community, solidarity, and Jesus’ mission in the world. (USCCB, Matrimony)
The matrimonial covenant, by which a man and a woman establish between themselves a partnership for their whole life, is for the good of the spouses and the procreation and education of children. This covenant between baptized persons has been raised by Christ to the dignity of a sacrament.