The multiple ways mind-altering drugs and meditation overlap to amplify results.Image by Mohamed Hassan from PixaBaySeveral years ago in Peru, deep into an ayahuasca ceremony, I opened my eyes. The light of a full moon streamed in through a skylight, illuminating my mat. It was completely silent — a rare moment of nobody muttering to themselves or struggling to vomit into their plastic bucket. The shaman was taking a break, smoking tobacco. My visions had stopped, but as I considered another ...