2021 Reprint of the 1929 Edition. Facsimile of the original edition and not reproduced with Optical Recognition Software. Complete in itself, this volume originated as a commentary and expansion of Manly P. Hall's masterpiece of symbolic philosophy, The Secret Teachings of All Ages. In Lectures on Ancient Philosophy, Manly P. Hall expands on the philosophical, metaphysical, and cosmological themes introduced in previous work. Hall wrote this volume as a reader's companion to his earlier work, intending it for those wishing to delve more deeply into the esoteric philosophies and ideas that undergird the Secret Teachings. A considerable portion of this work is devoted to the rituals and figures of the Greek Mysteries and to the teachings of classical pagan metaphysics in general. The book also discusses ancient Christianity, Rosicrucian and Freemasonic traditions, ancient mysteries, pagan rites and symbols, and Pythagorean mathematics. First published in 1929--the year after the publication of Hall's magnum opus--this edition includes the author's original subject index and twenty diagrams prepared under his supervision for the volume.