I’ve uploaded an essay, “Mystical Experience and the Evolution of Consciousness: 21st Century Gnosis” to the Academia.edu website, where you can download it. It’s the text to a talk I gave at the 2014 Engelsberg Seminar held in Avesta, Sweden. Other contributors included Elaine Pagels, Wouter J. Hanegraaff, Marco Pasi, and A. N. Wilson, to mention a few. The seminars are presented by the Ax:son Johnson Foundation, a wonderfully open-minded philanthropic establishment.
The talk links recent developments in split-brain research with the experience of gnosis and the evolution of consciousness. It presents more or less the basic idea that I develop at greater length in The Secret Teachers of the Western World.