Man as seen as an organism or man as seen as a person discloses different aspects of the human reality to the investigator. Both are quite possible methodologically but one must be alert to the possible occasion for confusion. (...) Seen as an organism, man cannot be anything else but a complex of things, of its, and the processes that ultimately comprise an organism are it-processes.

The Divided Self: An Existential Study in Sanity and Madness (ed. Penguin UK, 2010) - ISBN: 9780141962085