Marriage before Christ
How much the Sacrament of Matrimony is superior to the marriages made both previous to and under the (Mosaic) Law may be judged from the fact that though the Gentiles themselves were convinced there was something divine in marriage, and for that reason regarded promiscuous intercourse as contrary to the law of nature, while they also considered fornication, adultery and other kinds of impurity to be punishable offences; yet their marriages never had any sacramental value.
Before Christ Marriage Had Fallen From Its Primitive Unity And Indissolubility
It should be added that if we consider the law of nature after the fall and the Law of Moses we shall easily see that marriage had fallen from its original honour and purity. Thus under the law of nature we read of many of the ancient Patriarchs that they had several wives at the same time; while under the Law of Moses it was permissible, should cause exist, to repudiate one's wife by giving her a bill of divorce. Both these (concessions) have been suppressed by the law of the Gospel, and marriage has been restored to its original state.
Christ Restored to Marriage its Primitive Qualities
Unity Of Marriage
Though some of the ancient Patriarchs are not to be blamed for having married several wives, since they did not act thus without divine dispensation, yet Christ our Lord has clearly shown that polygamy is not in keeping with the nature of Matrimony. These are His words: For this cause shall a man leave father and mother, and shall cleave unto his wife, and they shall be two in one flesh; and He adds: wherefore they are no more two but one flesh. In these words He makes it clear that God instituted marriage to be the union of two, and only two persons. The same truth He has taught very distinctly in another passage, wherein He says: Whosoever shall put away his wife and marry another, committeth adultery against her; and if the wife shall put away her husband, and be married to another, she committeth adultery. For if it were lawful for a man to have several wives, there is no reason why he who takes to himself a second wife, along with the wife he already has, should be regarded as more guilty of adultery than if he had dismissed his first wife and taken a second.