I recently went on a 10-day silent meditation retreat. On day seven I was sitting outside after meditating and I noticed that the ground was moving. The dirt was subtly sparkling and fluctuating, like a field of ripples in a dirt pond. At first I thought I was imaging things. But then it struck me, this is what the ground looks like on mushrooms. The movements were nearly identical. The only difference was that the fluctuations didn’t take on a breathing quality, they were more like waves. I ...