Partie 9 · Chapitre 37

The matter, in brief, is this: while the upper Light spreads downward, so long as its power has not weakened and slackened, it is called male; and when it reaches a place where its power has weakened, it is called female — in the secret of "his power grew weak as a female's." That is: when the upper Light descends into ZA [Zeir Anpin], it does not pass through a Masach [screen] at all, for it is set and clothed within the Kelim [vessels] of Ima, and the mouth of the Yesod of Ima opens within ZA; and just as those Lights came out of the Mochin of Aba, so are they now within Zeir, in that very same illumination. Therefore they are called male Lights, both the Hassadim and the Gevurot — as is known, for a man's daughters, although they are called females, were called males while they were at first comprised in the father's brain.