Culadasa (John Yates), former neuroscientist who became a meditation master, is the author of an excellent recent book published about meditation, The Mind Illuminated: A Complete Meditation Guide Integrating Buddhist Wisdom and Brain Science for Greater Mindfulness.
The SciShow Psych channel on YouTube published a video about near-death experiences, below. I've mentioned near-death experiences a couple times before in relationship to mysticism and visionary experience. They are very much related, it seems to me.
I believe that meditation and other related contemplative techniques, including the use of seer stones, can help us become aware of the Divine and enter God's Presence. This post introduces some concepts from psychology and neurobiology which might begin to help explain how this happens.