Illumination, the religion of the Ancient Order of the Illuminati, began with Pythagoras and is the world's only "Logos" religion, i.e. a rational religion founded on mathematics, science and philosophy. It has no connection with Mythos religions such as Judaism, Christianity and Islam.

Illumination is the Grand Unified Theory of Everything, linking science, religion, psychology, philosophy and even the "paranormal". It does so via the only medium of truth and absolute knowledge: mathematics, which Pythagoras enigmatically declared to be the arche, the fundamental substance of existence. Whereas science is based on mathematical materialism, Illumination uses Leibnizian mathematical idealism. This is one of a series of books providing the ultimate answers to the nature of existence.