…just as the senses can neither grasp nor perceive the things of the mind, just as representation and shape cannot take in the simple and the shapeless, just as corporal form cannot lay hold of the intangible and incorporeal, by the same standard of truth beings are surpassed by the inﬁnity beyond being, intelligences by that oneness which is beyond intelligence. Indeed the inscrutable One is out of the reach of every rational process. Nor can any words come up to the inexpressible Good, this One, this Source of all unity, this supra-existent Being. Mind beyond mind, word beyond speech, it is gathered up by no discourse, by no intuition, by no name. It is and it is as no other being is. Cause of all existence, and therefore itself transcending existence, it alone could give an authoritative account of what it really is”.
Dionysius the Areopagite (From Pseudo-Dionysius: The Complete Works (Classics of Western Spirituality)