The permanence of marriage is established in both the beginning of time and the Bible (Genesis 2.) God’s intentions are clear throughout the Bible — one man, one woman, for life — even though violations to His rule were common in Bible history.
When questioned about the matter of divorce, Jesus answered by returning to God’s original teaching on the subject, while clarifying some questions relevant to the culture of the day, and then specifying one narrow exception.
Divorce is destructive and sinful. The question of remarriage is complicated only by the mistakes and sins we produce in our lives. Start with an understanding of the simple truth of righteousness and stand there.