Christians, explain this to me please?

As a Christian I can not answer that since I have not been married. You may have to ask those Christians who have been divorced to give you a reasonable answer. But what I can give to you is this; my sister and her husband, if it had not been for their strong faith in the Lord would have divorced quite some time ago, but this past year they celebrated their 44th marriage anniversary.Their love for one another and their love for God kept their marriage strong.