Chessick R D
Am J Psychother. 1984 Apr;38(2):229-38. doi: 10.1176/appi.psychotherapy.1984.38.2.229.
The approaches to understanding a person's life represented by Freud's psychoanalysis and Sartre's "existential psychoanalysis" are fundamentally opposed. Starting from entirely different epistemological premises, they reach irreconcilable views on the nature of man and psychopathology, and lead to quite dissimilar and opposed formulations for psychotherapy.