We may try to desacralize the tea and render it down to a matter of chemistry and botany, receptor sites and pharmacology, but none of these things will ever explain the undeniable and profound mystery that is ayahuasca.
It is the ultimate estranging Enlightenment thing to reduce God to an entity that, like the brain, can be weighed and compared pound to pound. But then once you have taken that plunge, it is hard to resist going the whole hog. Is he middle class? Is he even a guy?