The first part is continuing the scripture passage you started. The question that comes from that is, if one spouse divorced another and committed adultery, does the traditional penalty for adultery apply? (that would be death). Have we become harsher or easier by not stoning the person but instead condemning them to Hell? If the adulterous divorcer is stoned, then the wronged party, now a widow, can remarry. Under current teaching, of course, she could not unless she were risking Hell. Absurd. For a long time, this passage stopped legal divorce in Catholic countries and restricted in Protestant ones. That was good for men, but not women. The bad old days are almost over, and will be if the rights of a partner wronged by her spouse are affirmed.