"There is another difficulty that confronts me when I try to describe my early self. In my youthful consciousness, more, perhaps, than in the case of many others, the borderline between external and internal realities was unfirm. I lived, particularly in childhood but with lessening intensity right on to middle age, in a world that was peculiarly and intimately my own, scarcely to be shared with others or even made plausible to them."