“[A certain Samaritan] said to [Rabbi Me’ir]: Is it possible that He of whom is written, The heavens and earth do not I fill? (Jeremiah 23:24) spoke to Moses from between the two poles of the Ark? He said to him: Bring me large mirrors. When he brought them he said to him, ‘Look at your reflection,’ and he saw it, large. ‘Bring me a small mirror.’ He brought it. ‘Look at your reflection in it.’ He saw it, small. He said to him: If you, who are but flesh and blood, can change yourself at will, how much more so He at whose word the world came into existence! Thus when He so wishes, The heavens and earth do not I fill? While when He wishes, He speaks to Moses from between the poles of the Ark. Rabbi Ḥanina son of Isei said: At times the world and its fullness cannot contain His glory, yet at times He speaks to man from between the hairs of his head, as is written, And YHWH answered Job from הַסְּעָרָה (ha-sea’arah), the whirlwind (Job 38:1)—from between שַׂעֲרוֹת (sa’arot), the hairs, of his head” (Bereshit Rabbah 4:4).
“A mirror in which all the colors appear; this is the dim glass” (Zohar 1:183a).
“There is a visionary mirror reflecting supernal colors, envisioned in that visionary mirror; there is vision within vision, and vision within vision, one above the other, all poised on specific rungs, presiding, called night vision. Through them spread all dreams of the world, these resembling those above” (Zohar 1:196a).