However, some of us fail. It is a sin. Therefore, as Jesus says, Moses gave us legal guidelines to regulate divorce and remarriage. We still have those guidelines protect property and person. Law, however, should not be the primary vocabulary of the church.
Grace is our language.
Law punishes us when we stumble and cross the line. Grace catches and holds us with forgiveness. Jesus was right about something else, also, and it applies to more sins than divorce. It gets at the relationship between our best efforts to enter the kingdom of God, and God's love already offered to us, forgiveness that surrounds us like a cloud, if we would but breathe it in. In the lectionary reading two weeks ago from Mark, the disciples argue privately about who among them is the greatest.