The New Covenant can be entered only by the new birth, and lived only by means of the Spirit. We are to Worship and love God above all else, rejecting all idols, insincerity, and self-effort. We are to love each other by respecting authority, life, marriage, truth, and property. We are to unselfishly lift each other up in pure words and deeds of love, kindness and mercy. God's absolute pattern for marriage is one man, joined to one woman, in love, for life.
Divorce is always sin.
Except for widowhood, remarriage is adultery. Alternative sex is sin. We are to guard the reputation and well-being of others by telling only the truth in love. We are to work for our living, surrendering our possessions to God for His use. We are to be content with whatever God has decided to give us, and give Him thanks.