 In 1846 Feuerbach published a number of “fragments” from his unpublished papers intended to document the course of his philosophical development. One of these fragments, entitled “Doubt”, and dated 1827–28 (which is the time when Feuerbach was writing his doctoral dissertation) seems already to anticipate Feuerbach’s later critique of Hegel. In this fragment we find him questioning the transition from the first to the second part of Hegel’s tripartite philosophical system, i.e., the transition from the logic to the philosophy of nature. The conceptual process traced by Hegel in the logic, whereby the categories of thought are successively deduced from one another, is driven by the negativity of the logical determinations of each of these categories, until the process culminates in the absolute Idea. But what negativity remains within the absolute Idea to propel the transition from thought to being unless it is that the purportedly “absolute” Idea remains in some sense incomplete until it becomes incarnate in the realm of the sensuous, i.e., nature. In that case, however, nature itself (as the realm of the sensuous) is the hidden truth of the Idea.