By personality I understand the totality of inherited and acquired psychic qualities which are characteristic of one individual and which make the individual unique. The difference between inherited and acquired qualities is on the whole synonymous with the difference between temperament, gifts, and all constitutionally given psychic qualities on the one hand and character on the other. (…) Differences in character are expressive of the degree to which an individual has succeeded in the art of living.― (1947a: Man for Himself. An Inquiry into the Psychology of Ethics, New York (Rinehart and Co.) 1947, pp. 50f.)