Note that throughout, our focus is language, not psychology or spirituality. We didn’t map why the people in our study changed their concepts and experienced an epiphany or had a shift in their awareness. We didn’t measure anything about their spiritual beliefs or practices. Ken Wilber, a world expert on developmental stages in society, author of two dozen books, and founder of the Integral Institute, told us that these two parts of a human being—her psychology/worldview/spirituality and her conversations—tend to advance in stages