This text challenges the concept of "natural" thinking by highlighting the absolute uniqueness of Greek philosophy. The author argues that Greek philosophy does not represent a general or universal stage of human reason that would spontaneously emerge in any culture. Instead, Greek philosophy is presented as a specific and historically singular phenomenon. The text emphasizes that in no other part of the world and in no other intellectual tradition did human thought reach the particular forms, structures, and methods that were developed in ancient Greece. By rejecting the label of "naturalness" for this type of reasoning, the author points to its contingency and exceptionality within world history. This reflection from January 1960 invites a deeper examination of how we perceive the roots of Western rationality. It questions whether it is justifiable to consider the Greek model as a universal benchmark for all human thought or if it should be seen as a specific cultural construct without parallel elsewhere in the world.