" Jack Crawford heard the rhythm and syntax of his own speech in Graham’s voice. He had heard Graham do that before, with other people. Often in intense conversation Graham took on the other person’s speech patterns. At first, Crawford had thought he was doing it deliberately, that it was a gimmick to get the back-and-forth rhythm going.
Later Crawford realized that Graham did it involuntarily, that sometimes he tried to stop and couldn’t. "

― Thomas Harris