1937. The commentary in this text is designed to guide the reader through a long and intricate argument and to explain what must remain obscure in the most faithful translation; for the Timaeus covers an immense field at the cost of compressing the thought into the smallest space. Only with some such aid can students of theology and philosophy have access to a document that has deeply influenced mediaeval and modern speculation. Contents: The Timaeus; The Discourse of Timaeus; What Comes About of Necessity; The Cooperation of Reason and Necessity.