Treatise on the Left Emanation

The Treatise on the Left Emanation is a Kabbalistic text by Rabbi Isaac ha-Kohen, who with his brother Jacob traveled in Spain and Provence in the period of 1260–1280.[1]

Isaac may be the pseudepigraphic author of other texts including the Pseudo-R. Eleazar Responsum, and the Pseudo-R. Yehushiel Responsa.[2]

Translation
  • Professor Ronald C. Kiener, published an incomplete translation in The Early Kabbalah, New York: Paulist Press, 1986.
gollark: This is using a "state monad", which is basically just what Haskell does because they wanted mutable variables but different somehow.
gollark: Less ironically, it's basically a purely functional way to, well, sequence actions which operate on state, sort of thing.
gollark: It's a monoid in the category of endofunctors.
gollark: Yes, that's right, I KNOW APPROXIMATELY HOW A STATE MONAD WORKS.
gollark: ```haskelldoThing :: Expr -> (M.Map Int IVal, Int)doThing expr = evalState (go expr) 0 where go :: Expr -> State Int (M.Map Int IVal, Int) go (Int x) = do vcount <- update (+1) pure (M.singleton vcount (Lit x), vcount) go (Op o a b) = do (m1, c1) <- go a (m2, c2) <- go b let prev = M.union m1 m2 nxt <- update (+1) pure (M.insert nxt (ROp o c1 c2) prev, nxt)```↑ thusly, none are safe

See also

References
  1. Arthur Versluis, Magic and Mysticism: an Introduction to Western Esotericism (2007) p. 65: "We must also note the appearance, in the thirteenth century, of the "Treatise on the Left Emanation" by Isaac ha-Kohen, who with his brother Jacob traveled in Spain and Provence in the period of 1260-1280"
  2. Mark Verman, The Books of Contemplation: Medieval Jewish Mystical Sources (1992) p. 176
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