the obsessional neurosis, is not so popular as the widely-known hysteria; it is, if I may so express myself, not so noisily ostentatious, behaves more as if it were a private affair of the patient’s, dispenses almost entirely with bodily manifestations and creates all its symptoms in the mental sphere.
Freud defines obsessional neurosis as the quintessentially inward, mental neurosis, constitutively opposed to hysteria’s somatic expressiveness, and identifies both as the twin foundations upon which psychoanalysis was built.
, Introductory Lectures on Psycho-Analysis, 1917thesis