Thanks for this Graham. What I find most interesting here is understanding gnosis as seeking illumination, not a reference to esoteric knowledge that is accessible only to a few and upon which salvation is based. That was or is part of Gnosticism which I understood, perhaps incorrectly.

Regarding the statement about a closed canon in Christianity while Gnosticism considers revelation ongoing, I would have to say as a traditional Christian I believe revelation to be ongoing as well. This applies certainly to the universal Church which continues to grow, evolve and change (as we discussed in the ongoing and needed reformation of Christianity). But also, and perhaps more so, on a personal level. My own view is that the Scriptures cannot be understood or conceived of as revelation of God outside the active work of the Holy Spirit in enlightening the reader. It is not the words that are sacred, as Muslims believe of the Koran, but it is the revelation of the God and truth through the active role of the Spirit that matters. Not all Christians believe that, but many do. In that way there is the kind of openness that it seems is referred to here.