Numerical Speculation, Sacred Geometry, and Hellenistic Astronomy

This chapter explores the influence of numerical thinking in later Platonism and Western esotericism, discussing the concept of sacred geometry and its role in modern esoteric traditions, as well as the connection between Plato, Pythagoreanism, and the metaphysical understanding of numbers. The chapter also hints at the upcoming exploration of Hellenistic astronomy in relation to Claudius Ptolemy and astrologer Vetius Valens.