This interview (link below) gives some interesting insight into his work and motivations. It’s in Russian, but Google Translate does a pretty good job with it.
http://baaltii1.livejournal.com/198675.html
Among many other things, he describes some unusual experiences in 2006–7 that clearly had a powerful impact on his thinking:
[Translation by Google]
“I had in a few months acquired a very considerable experience of visions, voices, periods when parts of my body did not obey me and a lot of incredible accidents. The most intense period was in mid-April 2007 when I spent 9 days (7 of them in the Mormon capital of Salt Lake City), never falling asleep for all these days.
Almost from the very beginning, I found that many of these phenomena (voices, visions, various sensory hallucinations), I can control. So I was not scared and did not feel sick, but perceived everything as something very interesting, actively trying to interact with those "creatures" in the auditorial, visual and then tactile spaces that appeared (themselves or by call) around me. I must say, probably, to avoid possible speculations on this topic, that I did not use any drugs during this period, tried to eat and sleep a lot, and drank diluted white wine.”