Its a phenomenon (and now technique) that follows a very basic but profound biological principle: We fear whats different and are drawn to whats similar. As the saying goes, birds of a feather flock together. Mirroring, then, when practiced consciously, is the art of insinuating similarity. Trust me, a mirror signals to anothers unconscious, You and Iwere alike. Once

Never Split the Difference by Chris Voss