Memoirs of a Geisha -- Arthur Golden

"Look at you, Nobu-san. You have a wrinkle between your eyes as deep as a rut in the road."

He let the muscles around his eyes relax a bit, so that the wrinkle seemed to dissolve. "I'm not as young as I once was, you know," he told me. 

"What is that supposed to mean?"

"It means there are some wrinkles that have become permanant features, and they aren't going to go away just because you say they should."

"There are good wrinkles and bad wrinkles, Nobu-san. Never forget it."