The Elements of Theology

Two hundred and eleven propositions with proofs, laid out like Euclid: every effect remains in its cause, proceeds from it, and returns to it; every multiplicity participates in unity; and the One is participated through the henads. It is metaphysics written as geometry.

The most systematic statement of emanation ever made in Greek — and the book, through Arabic and Latin intermediaries, that carried the shape of the sephirot westward before there were sephirot.