 Freud in the twenties came belatedly to the realisation of the importance of an 'unconscious morality' in opposing his therapeutic aims.Thereupon he divided the sources of resistance into five, pointing out that "The fifth, coming from the "super-ego" and the last to be discovered…seems to originate from the sense of guilt or need for punishment".However he also pointed out how often the patient does not feel guilty so much as unwell, when their superego resistance is in operation.