I would say much of religious heresy is the result of a misunderstanding of the basic nature of God. And once we have a proper understanding of God, then usually most of the areas of our life coincide with who God is and what He desires for each one of us.

What you are as a single person, you will be as a married person, only to a greater degree. Any negative character trait will be intensified in a marriage relationship, because you will feel free to let your guard down -- that person has committed himself to you and you no longer have to worry about scaring him off.