Pythagoras

Somewhere in the sixth century before Christ, a man became convinced that the cosmos is built out of number, that the same ratios which make a plucked string sound beautiful also govern the movements of the stars, and that the soul is immortal and travels through many lives. He founded a secret brotherhood to live by these truths. He wrote none of them down. And yet Pythagoras stands at the headwaters of Western thought — the figure in whom mathematics and mysticism were, for the first time, one single vision. Every later tradition that reads the cosmos as an ordered, harmonious, meaningful whole — including astrology itself — is drinking from the spring he opened.

The Life

Pythagoras was born around 570 BCE on the Greek island of Samos, off the coast of what is now Turkey. Ancient accounts describe him traveling in his youth through Egypt and perhaps Babylon, absorbing their mathematical and religious learning, though how much of this is history and how much legend cannot be recovered. Around 530 BCE he emigrated to Croton, a Greek colony in southern Italy, and there founded the community that would carry his name.

It was no ordinary school. The Pythagorean brotherhood was a disciplined religious-philosophical order, its members bound by vows, sharing possessions, following strict rules of diet and conduct, and — famously — sworn to secrecy. New members reportedly spent years in silence, listening from behind a curtain before they were admitted to the master's presence. The community grew powerful enough to dominate the politics of Croton for a time, which eventually provoked violent backlash; around the middle of the fifth century BCE its meeting houses were burned and its members scattered. Pythagoras himself is said to have died around 495 BCE, the circumstances uncertain.

One fact shapes everything we can say about him: Pythagoras wrote nothing, and no detailed account survives from anyone who knew him. Everything comes through later sources — Aristotle's reports, the biographies of Diogenes Laertius, Iamblichus, and Porphyry, and the writings of later Pythagoreans. Separating the historical man from the accumulated legend is one of the great unsolved problems of ancient scholarship, and honesty requires holding his teachings as the tradition's, not always provably his own.

What He Taught

The doctrine most securely tied to Pythagoras is metempsychosis — the transmigration of the soul. The soul is immortal, he held, and passes at death into a new body, human or animal, beginning a new life in a long cycle of rebirth from which it seeks, through purification, to be freed. Here, at the dawn of Western philosophy, is a serious teaching of reincarnation and the soul's evolution.

His second great intuition was that number is the nature of things. The Pythagoreans discovered that musical harmony rests on simple numerical ratios — that the concords pleasing to the ear correspond to whole-number relationships of string length. From this they leapt to a cosmic vision: if number governs music, perhaps number governs everything, and the heavens themselves move in a great inaudible harmony of the spheres. Pythagoras is credited with being the first to call the universe a kosmos — an ordered, beautiful whole. Reality, in this view, is not chaos but music written in mathematics.

Influence and Legacy

Pythagoras's shadow is immense. His conviction that the deepest truths are mathematical, and that the soul is immortal, passed directly into Plato, and through Plato into all of Western philosophy and, later, into Neoplatonism. His fusion of number, harmony, and the sacred became the root of Western sacred geometry, esoteric numerology, and the enduring belief — central to astrology and to the whole Hermetic tradition — that the cosmos is an ordered, meaningful correspondence that the initiated can learn to read. Even his brotherhood became a model: a community of initiates, bound by secrecy and shared discipline, prefiguring every later initiatic order from the Mystery temples to the Golden Dawn.

Where to Go Deeper

Pythagoras belongs to the world of the Ancient Mystery Schools, whose initiatory spirit his brotherhood embodied, and his philosophy is the direct ancestor of Neoplatonism — carried to its height by Plotinus. His vision of a mathematically harmonious cosmos underlies Hermeticism and the practice of astrology itself.

Continue your journey through the Rebirth & Alchemy Library — and listen for the music the numbers are making.