The Sefer Yetzirah is, according to the different approaches, the earliest Jewish scientific treatise, or a treatise on mathematics and sacred grammar, or the earliest and most enigmatic book on Jewish esotericism. It is traditionally ascribed to “our father Abraham”, though modern scholarship tends to date it around the 9th century CE.
In thirty-two mysterious paths of Wisdom, Yah… Almighty God, engraved and created His world in three Sefarim: in writing, number and word. Ten Sefirot out of nothing, twenty-two foundation letters, three mothers, seven doubles and twelve simples.
Click here to view the PDF of an English translation with excerpts of a medieval Arabic commentary.
For several Hebrew versions, including facsimiles of early printed material, follow this link to Hebrewbooks.org. For further English literature, the “Notes on Editions of Sefer Yetzirah in English” are highly recommended, with thanks to Don Karr.