Again Hearn realised that fairy tales had their origin in dreams, an idea that has been developed by Rank, Abraham and Ricklin, disciples of Freud. Hearn saw that there was an intimate connection between literature and dreams. He is one of the first men to have seen the relation between dreams and supernatural literature. The following passages are from the lecture on "The Supernatural in Literature" in the second volume of _Interpretation of Literature_. "Whether you believe in ghosts or not, all the artistic elements of ghostly literature exist in your dreams, and form a veritable treasury of literary material for the man that knows how to use them." "Trust to your own dream life; study it carefully, and draw your inspiration from that. For dreams are the primary source of almost everything that is beautiful in the literature which treats of what lies beyond mere daily experience." Hearn, with Samuel Butler, is one of the great champions for the theory about the power of unconscious memory over us. This idea is one of the axioms of psychoanalysis, or rather one of its pillars. In his essay, "About Ancestor Worship" in _Kokoro_, Hearn develops his theories of inherited memory at length, and one might say that there is scarcely an essay of his that does not touch on the subject. Here he states one of the leading lessons taught by psychoanalysis. Hearn realised that we should not starve all our primitive tendencies, as this would lead to the destruction of some of the highest emotional faculties with which they are blended. The animal tendencies must be partly extirpated and partly sublimated. This is practically Freud's theory that neurosis is produced by trying to stamp out our sexual impulses (yet Freud does not mean that we should give these full play). The following passage from Hearn's essay is part of the prophylaxis of psychoanalysis. "Theological legislation, irrationally directed against human weaknesses, has only aggravated social disorders; and laws against pleasure have only provoked debaucheries. The history of morals teaches very plainly indeed that our bad Kami require some propitiation. The passions still remain more powerful than the reason in man because they are incomparably older, because they were once all essential to self-preservation,--because they made that primal stratum, of consciousness out of which the nobler sentiments have slowly grown. Never can they be suffered to rule; but woe to whosoever would deny their immemorial rights." He has a similar idea in his essay on "Nirvana." "Mental and moral advance has thus far been effected only through constant struggles older than reason or moral feeling,--against the instincts and appetites of primitive brute life.... Only through millions of births have we been able to reach this our present imperfect state; and the dark bequests of our darkest past are still strong enough betimes to prevail over reason and ethical feeling."