This volume retains all of Taylor's introduction, notes, and his reconstruction of the lost seventh book. It is an essentially religious work;- a near perfect attempt to express in a manner accessible to the reasoning mind, the universal order in, of, and around, all things. As such, Proclus' masterpiece is pan-cosmic in its scope, illuminating for us the Principles which produce, vivify, and perfect the whole of Being, Life, Intellect, Soul, Nature, and Body, while suspending all these from one exempt and superessential Unity, called The ONE and The GOOD, which all things abide in, proceed from, and return to. It has been called one of the Great Scriptures of the world. Although the sublime genius of Proclus can be seen at its best in this `magnum opus', Taylor's translation is, unbelievably, still the only one available. This is the first full republication of his original two-volume work, published here in a single volume. With standard pagination from the Belles Lettres Westerink-Saffrey text.