The sense of guilt, the severity of the super-ego, is therefore the same thing as the rigour of conscience; it is the perception the ego has that it is watched in this way, the ego's appreciation of the tension between its strivings and the standards of the super-ego.
Freud defines the sense of guilt structurally as the ego's apprehension of super-ego scrutiny, collapsing conscience, guilt, and the need for punishment into a single psychic mechanism.
, Civilization and Its Discontents, 1930thesis