There is a man or woman behind the curtain of everybody’s persona. Through our social relationships we get to know a small number of beings with the level of intimacy that allows us to peel back the curtain—our friends, close neighbors, family members, and perhaps the family dog (though certainly not the cat). But we don’t get to pull the curtain very far back on most of the people we meet, and it is usually drawn fully closed when we encounter someone for the first time. As a result, certain superficial qualities, such as voice, face and expression, posture, and the other nonverbal characteristics I’ve been talking about, mold many of the judgments we make about people—the nice or nasty people we work with, our neighbors, our doctors, our kids’ teachers, the politicians we vote for or against or simply try to ignore. Every day we meet people and form judgments like I trust that babysitter, This lawyer knows what she is doing, or That guy seems like the type who would gently stroke my back while reciting Shakespeare sonnets by candlelight. If you are a job applicant, the quality of your handshake can affect the outcome of your employment interview. If you are a salesperson, your degree of eye contact can influence your rating of customer satisfaction. If you are a doctor, the tone of your voice can have an impact on not only your patients’ assessment of their visit but their propensity to sue if something goes wrong. We humans are superior to cowbirds in our conscious understanding. But we also have a deep inner cowbird mind that reacts to nonverbal cues, uncensored by those logical judgments of consciousness. The expression “to be a real human being” means to act with compassion. Other languages have similar expressions, such as the German “ein Mensch sein.” A human being, by nature, cannot help but pick up on the emotions and intentions of others. That ability is built into our brains, and there is no off switch.
Leonard Mlodinow, Subliminal: How Your Unconscious Mind Rules Your Behavior, P.143