When Jesus came, he elevated matrimony to the same status it had originally possessed between Adam and Eve—the status of a sacrament.
Thus, any valid marriage between two baptized people is a sacramental marriage and, once consummated, cannot be dissolved.
Jesus, therefore, taught that if anyone so married divorces and remarries, that person is living in perpetual adultery, a state of mortal sin.
He said, "Every one who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery" (Luke 16:18; cf. Mark 10:11–12).
Paul was equally insistent on this fact, declaring, "Thus a married woman is bound by law to her husband as long as he lives. . . . Accordingly, she will be called an adulteress if she lives with another man while her husband is alive" (Rom. 7:2–3).
Quotations from the early Church Fathers illustrate that they recognized the seriousness of Christ’s teaching regarding the indissolubility of marriage.
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