I think the "natural piety" part also gives the works a very universally accessible quality - every culture in the world understands and has its own version of

I think the "natural piety" part also gives the works a very universally accessible quality - every culture in the world understands and has its own version of it in their religion or spiritualism. One doesn't need to know the details of Christianity or German culture to follow the emotions and motivations of the characters. The same with the archetypes: siblings, stepmothers or stepfathers, these are universal roles. Even when our modern-day lives don't feature many "hunters" or "woodsmen" it's part of every culture's collective history.