Many years ago I heard a paper read by a colleague who was very philosophically astute and informed. The paper was on ethics, and it was rigorously argued, proper distinctions were made, and the critique of other points of view was cogent.... When my colleague finished his paper the man chairing the meeting said, "That's not ethics. Ethics has to do with prophecy. I learned that from Rabbi Abraham Heschel."

p. 47 - "Varieties of Moral Discourse: Prophetic, Narrative, Ethical and Policy"