1. Annas, J., An introduction to Plato’s Republic (Oxford: Clarendon Press 1981).
2. Assmann, J., Die Erfindung des inneren Menschen. Studien zur religiösen Anthropologie (Gütersloh: Gütersloher Verl.-Haus Mohn 1993).
3. Betz, H.D., “The Concept of the ‘Inner Human Being’ (ho esō anthrōpos) in the Anthropology of Paul,” New Testament Studies 46/3 (2000) 315–341.
4. Blumenberg, H., Paradigmen zu einer Metaphorologie, 2 ed. (Frankfurt am Main: Suhrkamp 1999).
5. Claus, D.B., Towards the Soul. An Inquiry into the Meaning of psychē before Plato (New Haven, MI: Yale University Press 1981).