Section 7
On the Ecclesiastical Hierarchy · Pseudo-Dionysius the Areopagite
Their numberless faces then, and many feet, manifest, as I think, their property of viewing the most Divine illuminations from many sides, and their conception of the good things of God as ever active and abundantly receptive; and the sixfold arrangement of the wings, of which the Scripture speaks, does not, I think, denote, as seems to some, a sacred number, but that of the highest Essence and Order around God; the first and middle and last of its contemplative and Godlike powers are altogether elevating, free, and supermundane. Hence the most holy wisdom of the Oracles, when reverently describing the formation of the wings, places the wings around their heads , and middle, and feet; suggesting their complete covering with wings, and their manifold faculty of leading to the Really Being.
PdEH 4.7.1