It will emerge into the Latin tradition with the translation of Pseudo-Denis. And our soul, by virtue of this reforming grace, is made entirely sufficient to comprehend him completely by love, who is incomprehensible to any created knowing power, such as an angel or a human soul. And to the second, which is the loving power, he is altogether completely knowable to each one individually. . . . There is a highly developed mystical tradition in the West. And it is a theoretical tradition - that is, there is a large literature about what is going on in mysticism, not just on how to do it or what it feels like.
Eastern philosophy has no monopoly on mysticism.
It is important to see exactly what Nyssa has done. He has tampered with the old Greek equation of being with intelligibility. There are two ways of viewing it. We may take Nyssa as denying that equation, so that while God is the most real thing around, he is nevertheless a dark night to the intellect. The most real is not the most intelligible.