In 1955 Jaspers published "Schelling", representing him as a forerunner of the existentialists and Walter Schulz, one of organizers of the 1954 conference, published "Die Vollendung des Deutschen Idealismus in der Spätphilosophie Schellings" ("The Perfection of German Idealism in Schelling's Late Philosophy") claiming that Schelling had made German idealism complete with his late philosophy, particularly with his Berlin lectures in the 1840s. Schulz presented Schelling as the person who resolved the philosophical problems which Hegel had left incomplete, in contrast to the contemporary idea that Schelling had been surpassed by Hegel much earlier. Theologian Paul Tillich wrote: "what I learned from Schelling became determinative of my own philosophical and theological development". Maurice Merleau-Ponty likened his own project of natural ontology to Schelling's in his 1957–58 Course on Nature.