Matisyahu, the reggae-rocker who recently shaved his long Hasidic locks, stopped by Rolling Stone recently and performed two songs from the sessions for his 2009 album Light and a dubby version of Bob Marley’s “Running Away.” Afterward, the singer talked about beards (of course) and learning how to let the music flow. “I really wish I could be more in the moment, like a child,”  he said.