Kabbalah

Sefer Yetzirah — The Book of Formation

The oldest surviving text of Jewish mysticism, a short but dense treatise describing how the universe was formed out of ten primal numbers and twenty-two Hebrew letters.

Sefer Yetzirah — 'Book of Formation' — is remarkably brief, only a few pages in most editions, yet it lays out a complete cosmology in which God creates the world using thirty-two 'paths of wisdom': ten sefirot and twenty-two letters treated as literal building materials, not just symbols. Its date is genuinely unsettled among scholars, with proposals ranging from the 2nd to the 6th century CE, and traditional legend even attributes it to the patriarch Abraham, though no serious modern scholar accepts that claim. Because it predates the Zohar by many centuries, Sefer Yetzirah's sefirot are more abstract — closer to primal dimensions than the elaborate personality-laden emanations the Zohar later develops them into. Nearly every subsequent Kabbalistic idea about letters, numbers, and creation — including gematria and the Tree of Life itself — has roots that trace back to this single, cryptic early text.

The unresolved dating of Sefer Yetzirah matters because it determines how much of 'Kabbalah' actually predates the movement's more famous medieval flowering in Provence and Spain.

Sefer Yetzirah