The article argues that the nature of law changes depending on how it is being interpreted. When seeking moral guidance from the law, natural law is the best approach, while legal positivism is better for describing or predicting how the law will be interpreted. This idea is called "legal dualism." Legal ethics are affected by this, as interpreters must act as natural lawyers when using the law for moral guidance. The article tests this idea against a book by Bradley Wendel and concludes that ethical attorneys sometimes need to make moral judgments in interpreting the law.