How can you learn anything about external reality from an experience that takes place entirely inside your own head? Initially skeptical of psychonauts, Dane reviewed DMT user reports and found five characteristic properties that seem to be self-authenticating. DMT users say their experiences contain elements that are hyper-real, not like being intoxicated, wonderous, trigger synchronicities, and demonstrate interpersonal stability. Dane compares the inference from mystical DMT vision to the reality of the supernatural to the writings of the great French philosopher Renee Descartes. In doing so, he builds the case that we can make sense of why many people who use DMT change their spiritual and metaphysical beliefs in response to the events that take place under its influence. Whatever you may think of all this, there’s no escaping from the larger cultural ramifications of a molecule that makes people take the supernatural seriously.