Naranjo notes that, fundamentally, the One is an over-civilized or over-controlled type. Typically, when Ones experience an impulse—to run, to express anger, to embrace someone—it moves up from the gut and through the body before being intercepted and judged by a well-developed critical function in the mind. If the impulse fails the inspection, the One’s critical thinking function labels the impulse “wrong” and represses it.