'Scripture represents marriage as a reflection of our covenant relationship with God. To violate marriage is to violate that covenant, and unfaithfulness to God is adultery. All sin is unfaithfulness to God, spiritual adultery. So the seventh commandment, like the others, actually covers all of life from its particular perspective. Whenever we sin, we can think of it as marital unfaithfulness. And we should think of it that way, better to understand our radical need of forgiveness from our heavenly husband.'
John Frame, The Doctrine of the Christian Life, p.747.
