Finally the soul, which has travelled by these ways towards the things that are above and has abandoned everything that is accessible to human nature, penetrates into the sanctuary of the knowledge of God that is wrapped on all sides in darkness. There, as everything perceptible and intelligible has been left outside, there remains for the soul’s contemplation only what cannot be grasped by the intellect. It is there that God dwells according to the words of Scripture: “Moses drew near to the thick darkness.”

Gregory of Nyssa (circa 335 – 395)