Moses de Leon, Mishkan ha-Edut, MS Berlin Or. Quat. 833, fol. 1b

Jewish Mysticism
Our holy Torah is a perfect Torah, “all the glory of the royal princess is inward” (Ps. 45-14). But because of our great and evil sins today “her dress is embroidered with golden mountings” (ibid.)… Thus God, blessed be He, laid a “covering of dolphin skin over it” (Num. 4-6) with the visible things [of this world]. Who can see and contemplate the great and awesome light hidden in the Torah except for the supernal and holy ancient ones? They entered her sanctuary and the great light was revealed to them… They removed the mask from her.

Translated by Elliot Wolfson in Through a Speculum that Shines- Vision and Imagination in Medieval Jewish Mysticism, Princeton- Princeton University Press, 1994.