" In phobias of animals the danger seems to be still felt entirely as an external one, just as it has undergone an external displacement in the symptom. In obsessional neuroses the danger is much more internalized. That portion of anxiety in regard to the super-ego which constitutes social anxiety still represents an internal substitute for an external danger, while the other portion — moral anxiety — is already completely endo-psychic. "

― Sigmund Freud , Inhibitions, Symptoms and Anxiety