What does the Bible teach that relates to marriages and families? What are the New Christian teachings that apply?
In a relationship, does it matter what a person believes about what's right, and what's wrong? Or, does it matter how a person acts? Sure it does. Does the Word have anything useful to say about it? Yes. Yes it does.
Are people fundamentally good? Or fundamentally evil? Or a mixture? Are we spiritual beings? Or just "random collocations of molecules"? How do we work?