Kabbalah sa Exodo 2:6: Sha'arei Orah

Happy is he who understands this great secret. For, from this he will understand the secret of white-Lavan-לבן, the secret of the moon-Levanah-לבנה, and the beginning-Rosh-ראש and end-Sof-סוף. Moreover, through this he will understand the secret of Lavan-לבן the Aramean, from whom the blemish of the moon-Levanah-לבנה came about, and that it is he who causes the World of Mercy to be closed, as is clearly understood by those who have eyes to see. It is for this very reason that the affliction of Tzara’at is caused by the secret of Lavan-לבן the Aramean, as it states,³⁷⁵Exodus 4:6; Also see Tikkunei Zohar 48b and elsewhere. “His hand was leprous-Metzora-מצורע like snow.” One who understands this will understand the secret of the affliction of Tzara’at, which is a sign of the closure of the World of Mercy. This is why Targum translates Tzara’at-צרעת as “closure-Segeeroo-סגירו.” Similarly, one who is afflicted with Tzara’at that is contained-Musgar-מוסגר can come to be in a state of absolute Tzara’at, or he can possibly become pure. This is a great secret. As explained, the affliction of Tzara’at-צרעת is brought about through evil speech (Lashon HaRa), for it is drawn from the place of the primordial snake-Nachash HaKadmonee, and it is he who causes the closure of the Gates of Mercy. However, “if there will be for someone but a single defending angel out of a thousand,”³⁷⁶Job 33:23 this can cause the World of Mercy, which had been closed, to open for him, and it then is possible that the contained-Musgar-מוסגר affliction of Tzara’at-צרעת does not come to be absolute. However, if he has no defender, he is caused to be an absolute Metzora-מצורע.