For me to sing on the subway, I told her, as much as I wanted to, was impossible, because forever standing between me and my singing on the subway was the essential, reluctant, ineradicable, inhibited core of me. “But don’t you believe in the possibility of change? Of self-improvement?” she asked. And I told her what I believed: that genuine self-improvement, actual fundamental change, was exceedingly rare—was,

