The Theology of Arithmetic

Iamblichus · ~300 d.C.

A Neoplatonic treatise on the 'theories' or symbolic properties attributed to each number from 1 to 10.

It assigns each number from 1 to 10 attributes inherited from the Pythagorean and Platonic tradition, fixing the 'meaning' of each digit that modern numerology keeps.

Iamblichus consolidated the theological reading of numbers: each figure from 1 to 10 carries a moral and cosmological meaning. It's the link between Pythagoras and medieval numerology.