Brain States

For the last year and a half, I have worked on this manuscript at a feverish pace. I would write on weekends, late at night, and sometimes sandwiched between clients. I wrote parts at 30,000 feet on cross-country plane flights.

My efforts were driven by a recognition that wherever I taught there was a general misunderstanding about altered states of awareness, and that some of these errors were actually hindering people in their personal growth and, in some cases, posing serious dangers.

This...