Three days into a weeklong Vipassana retreat at Spirit Rock Meditation Center, just north of San Francisco, California, I notice myself itching, unbearably. I’m not the only person distracted by the desire to scratch. Someone else leaves a handwritten note on the staff bulletin board confessing discomfort. The senior teacher responds by devoting an entire dharma session to “the itch,” the gist of which amounts to the following: observe the body’s suffering and let it go. The aching knee, the tickle in the back of the throat—just sensory experiences. Name, but refrain from scratching at all costs.