" I know what you mean,” I said. “The thing is, it’s not something I have to be told. I’ve always been a stubborn son of a bitch. When I start something I have a hell of a time letting go of it. I think that’s the main way I solve things, to tell you the truth. I don’t do it by being brilliant. I just hang on like a bulldog until something shakes loose. "

― Lawrence Block , A Walk Among the Tombstones (Matthew Scudder, #10)