Zohar 2:98b

Jewish Mysticism
The Holy One, blessed be He, enters all the hidden things that He has made into the holy Torah, and everything is found in the Torah. The Torah reveals that hidden thing and then it is immediately clothed in another garment where it is hidden and not revealed. And even though that thing is hidden in its garment the sages, who are full of eyes, see it from within its garment. When that thing is revealed, before it enters into a garment, they cast an open eye upon it, and even though [the thing] is immediately concealed, it does not depart from their eyes.

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