Hardness of Heart and Keeping One's Estate

"The two shall become one." Adultery is a big no-no, because keeping right relationship is like God, and leaving right relationship, being in a wrong relationship, is unlike God. Ask the angels who left their estate to marry human women (read the Book of Jude). Divorce is allowed (by men's law) because of hardness of heart. What hardness of heart? Wanting to leave one's estate. Better if we all just accept our estate and live it the best it can be lived.