Or ha-Sekhel · אור השכל

A treatise in ten parts, written at the request of two companions — R. Abraham the Maskil and R. Nathan the Discerning — to profit beginners in the contemplation of the Explicit Name and show them the way to its knowledge. It takes its title from the First Cause, the light of the intellect, which Abulafia calls the fencer of every breach; his first part carries that name. The ten parts climb from the fence of deeds and commandments through the secret of the holy tongue and the letters of creation, the divine names and the letters of the unique Name, the turning of the letters — permutation, substitution, weighing, gematria — and the pronouncing of the Name with its vowels, to the tenth, the form of prophecy: the attainment of the Active Intellect, and the influx that compels whoever receives it to speak and to write. The letters marking the ten parts spell the author's own name, which he sets out in the colophon: Abraham the Sefardi, son of Samuel Abulafia, may the memory of the righteous be for a blessing.