Jewish Mysticism
From an anonymous commentary from the Hug Sefer ha-Temunah, the circle of the “Book of the Image,” on the seventy-two letter name of God extant in several manuscripts (a version of this text was printed as part of Sefer Raziel; cf. Scholem, Catologus Codicum Cabbalisticorum Hebraicorum, p. 7, n. 1). Cf. MS JTSA Mic. 8115, fols. 66b-67a (MSS Cambridge Heb. Add. 671, fol. 84a; Oxford-Bodleian 1938, fols. 196a-197a)-

Then you will know something of the ways of the Supernal who illuminates the eyes of His sages, as it is written, ‘A light shines for the upright in the darkness’ (Ps. 112-4). They vindicate [those of] a pure intellect and place them in the supernal light, as it says, ‘For the commandment is a lamp, the teaching is a light’ (Prov. 6-23). If he comprehends God, blessed be He, to place his intellect [in a] straight way, to comprehend the form, combination, holy number, and vocalization of the glorious, awesome, and explicit name in holiness and purity, fortunate is he and his offspring. If he constantly directs his attention to God, then he will comprehend His light, and his intellect will be filled with the light of the angels, ‘for he is an angel of the Lord of Hosts’ (Mal. 2-7). For this form engraved on the throne… [consists of] the twenty-two letters of the Torah which are the mystery of the letters AHYH [i.e., the name Ehyeh whose consonants equal 21, and together with the word itself equal 22 corresponding the number of letters in the Hebrew alphabet], and they are the light of every creature, the angels above and Israel below. One letter is engraved in them and amongst them, as it says, ‘For My name is in him’ (exod. 23-21), ‘in the midst of this people’ (Num. 14-14).

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