Where did Joseph's pre-Torah morality come from?

• Where did Joseph's morality come from when his existence was pre-Torah?

Returning to Mike's Joseph question, Ben proposes that Joseph understood the character of God passed down orally — "how could I violate the character of my God" — and that the Torah was God's gift codifying that character for fallible humanity. The Genesis stories worked because memorable narratives carry God's character; the hosts contrast that with Hollywood, the average teenager's storyteller, noting Potiphar's wife would be a selfie opportunity in the modern telling.