Hume believes that impressions are also subjective, temporary, provisional, prejudicial, and even skewed – and therefore cannot be persisting. Hume asserted that as long as we only derive our knowledge from sense of impressions, there will be no “self”. For Hume, all we know about our self are just bundles of temporary impressions, and this supports the difficulty in answering the question “Who am I?” because everything we can readily answer is temporary (like color of the hair, height, weight, affiliations, etc.) and these are all non-persisting. In fact, Hume harshly claimed that there IS no self.
