What does the Catholic Church teach about marriage?
Basing her teaching on God’s revelation in Scripture and the meaning of the human person, created male and female in the image of God, the Catholic Church teaches that marriage is the lifelong partnership of mutual and exclusive fidelity between a man and a woman ordered by its very nature to the good of the spouses and the procreation and education of children (see CCC, no. 1601; CIC, can. 1055.1; GS, no. 48). The bond of marriage is indissoluble – that is, it lasts “until death do us part.” At the heart of married love is the total gift of self that husband and wife freely offer to each other. Because of their sexual difference, husband and wife can truly become “one flesh” and can give to each other “the reality of children, who are a living reflection of their love” (FC, no. 14).
Marriage between a baptized man and a baptized woman is a sacrament. This means that the bond between husband and wife is a visible sign of the sacrificial love of Christ for his Church. As a sacrament, marriage gives spouses the grace they need to love each other generously, in imitation of Christ.