In his book titled "Prometheus: Archetypal Image of Human Existence", C. Kerényi states the key contrast between Goethe's version of Prometheus with the ancient Greek version. As Kerényi states, "Goethe's Prometheus had Zeus for father and a goddess for mother. With this change from the traditional lineage the poet distinguished his hero from the race of the Titans." For Goethe, the metaphorical comparison of Prometheus to the image of the Son from the New Testament narratives was of central importance, with the figure of Zeus in Goethe's reading being metaphorically matched directly to the image of the Father from the New Testament narratives.