The final Gospel passage regarding divorce is Luke 16:18 —
“Anyone who divorces his wife and marries another woman commits adultery, and the man who marries a divorced woman commits adultery.”
Edwards points out that the original Greek in this passage requires that the actions translated as “divorces” and “marries” must occur simultaneously with the verb “adultery” — eliminating any possibility that Jesus is suggesting that the adultery occurs after marriage — it occurs at the same time as the divorce and remarriage — not later.
“Divorces” and “marries” are participles in the Greek, and parallel participles ordinarily express simultaneous action.
Why is the remarriage “adultery”? Because in this case the divorce was in order to remarry — the temptation to be with another woman led to the break up of the first marriage, making the second marriage a direct product of the sin that triggered the divorce. Hence, this passage is entirely consistent with our view of Matthew 19.
Thus, Jesus’ point is that it’s sin to divorce in order to marry someone else, as you are to be entirely loyal to your spouse as long as you’re married. You may not fall in love with someone while married to someone else. If you do, you may not divorce in order to be with your love.
Christianity is about serving other people. Getting your way at the cost of harming others is not in the cards. Repentance means submission to God and to others. God doesn’t promise you heaven on earth — or even a soul mate. Heaven comes later.
There are many New Testament passages where spouses are urged to make sacrifices for the sake of the Kingdom (e.g., 1 Cor. 7:12-13; 1 Pet. 3:1), and one sacrifice is to love your spouse and not go looking for a better one. Of course, there are exceptions, but the exceptions aren’t about anything remotely selfish.
 Edwards, pp. 150-151.