For Carl Jung, a name was not just a name. In his 1960 book “Synchronicity,” the Swiss psychiatrist proposed that what you’re called may have a determining effect on your whole life, structuring your behaviors and your outlook in ways that resemble a secret compulsion.

Someone called Herr Gross (“Mr. Tall,” in German) probably “suffers from delusions of grandeur,” Jung wrote, while Herr Kleiner (“Mr. Little Guy”) “has an inferiority complex.” The good doctor did not spare himself from this diagnosis; why is Herr Doktor Jung so interested in youth, while Freud (“Dr. Joy”) espouses the pleasure principle?