There is another meaning that might be attached to this admonition to be oneself; that one should not try to disguise himself. I suspect this comes nearer to what psychologists mean when they urge people to be themselves. It is presumed that the person who faces the world barefaced is more spontaneous, that he expresses himself more fully, and that he has a better chance of developing all his resources if he assumes no disguises.

The Language of Hypothesis, 1964