“There is a visionary mirror reflecting supernal colors, envisioned in that visionary mirror [Shekhinah]; there is vision within vision, and vision within vision, one above the other, all poised on specific rungs, presiding, called night vision (Daniel 2:19). Through them spread all dreams of the world, these resembling those above” (Zohar 1:196a).
“Come and see: All prophets of the world absorb from a single facet, through two known rungs [Netsaḥ and Hod which are considered a single field of prophetic vision]. Those rungs appeared through a dim glass, as is written: בַּמַּרְאָה (ba-mar’ah), in a vision, I make Myself known to him (Numbers 12:6). Who is בַּמַּרְאָ (ba-mar’ah)? As has been said: a mirror in which all colors appear; this is the dim glass” (Zohar 1:183a, cf. ibid. 2:82b).
“[Moses the Faithful Shepherd] said ‘[Rabbi Shim’on son of Yoḥai] Holy Lamp, this vision is at times preceded by the letter ה (he), as in, And it was according to the appearance of הַמַּרְאֶה (ha-mar’eh), the vision [which I saw] (Ezekiel 43:3) and at times by the letter ב (bet), as in, I make Myself known to him בַּמַּרְאָה (ba-mar’ah), in a vision (Numbers 12:6); at times by מ (mem), as in, מִמַּרְאֵה (mi-mar’eh), from the appearance, of his waist and downward (Ezekiel 1:27), at times with כ (kaf), as in, כְּמַרְאֵה (ke-mar’eh), as the appearance, of a man upon it (ibid., 26); sometimes by ו (vav), as in, וּמַרְאֵה (u-mar’eh), And the sight, of the glory of YHWH (Exodus 24:17), and ל (lamed), as in, לְמַרְאֵה (le-mar’eh), as soon as she saw, them with her eyes (Ezekiel 23:16). Yet it did not need an additional letter at all except ב (bet) of בַּמַּרְאָה (ba-mar’ah). But surely this mirror [Shekhinah] comprehends ten sefirot, and each letter indicates its sefirah, namely כְּמַרְאֵה (ke-mar’ah) with כ (kaf), indicates כֶּתֶר (keter), Crown, and so on; the rest of the letters each shows its own sefirah. And there is no need to speak here at length; a hint is sufficient for the wise.’
… Similes and apparitions are like deducing one thing from another; likening one thing to another, but a vision that is in the mind’s eye is like a light that shines on the pupil of the eye since the pupil [Shekhinah] is black, as is written, I am black but desirable (Song of Songs 1:5), with the white light in the eye that shines. This pupil of the eye is called the mitsvah is a lamp (Proverbs 6:23), and the light that shines within it from inside is, and Torah a light (ibid.).
… The dream is with the eyes shut for which reason it is called the dim glass. Prophecy is a vision with open eyes, since the three colors of the eye correspond to the three patriarchs [Ḥesed, Gevurah, Tif’eret] in which the only Daughter [בַּת עֵינָא (bat eina), daughter of the eye, i.e., the pupil of the eye] shines. The two sides of the eyes are Netsaḥ and Hod, and the vision [of prophecy] is seen only through them. When they are open it is a waking vision and when they are shut it is a vision in a dream” (Zohar 3:281a, Ra’aya Meheimna Ki Tetse).