Council of Florence (17th Ecumenical)
Exultate Deo – 22nd November 1439
The seventh [sacrament] is the sacrament of matrimony, which is a sign of the union of Christ and the church according to the words of the apostle: This sacrament is a great one, but I speak in Christ and in the church. The efficient cause of matrimony is usually mutual consent expressed in words about the present. A threefold good is attributed to matrimony. The first is the procreation and bringing up of children for the worship of God. The second is the mutual faithfulness of the spouses towards each other. The third is the indissolubility of marriage, since it signifies the indivisible union of Christ and the church. Although separation of bed is lawful on account of fornication, it is not lawful to contract another marriage, since the bond of a legitimately contracted marriage is perpetual.