“I really agree that Yog-Sothoth is a basically immature conception, & unfitted for really serious literature. The fact is, I have never approached serious literature yet.”

Letter to Frank Belknap Long (27 February 1931), in Selected Letters III, 1929-1931 edited by August Derleth and Donald Wandrei, p. 293
Non-Fiction, Letters, to Frank Belknap Long
Context: I really agree that Yog-Sothoth is a basically immature conception, & unfitted for really serious literature. The fact is, I have never approached serious literature yet. But I consider the use of actual folk-myths as even more childish than the use of new artificial myths, since in the former one is forced to retain many blatant peurilities & contradictions of experienced which could be subtilised or smoothed over if the supernaturalism were modelled to order for the given case. The only permanently artistic use of Yog-Sothothery, I think, is in symbolic or associative phantasy of the frankly poetic type; in which fixed dream-patterns of the natural organism are given an embodiment & crystallisation... But there is another phase of cosmic phantasy (which may or may not include frank Yog-Sothothery) whose foundations appear to me as better grounded than those of ordinary oneiroscopy; personal limitations regarding the sense of outsideness. I refer to the aesthetic crystallisation of that burning & inextinguishable feeling of mixed wonder & oppression which the sensitive imagination experiences upon scaling itself & its restrictions against the vast & provocative abyss of the unknown. This has always been the chief emotion in my psychology; & whilst it obviously figures less in the psychology of the majority, it is clearly a well-defined & permanent factor from which very few sensitive persons are wholly free.... Reason as we may, we cannot destroy a normal perception of the highly limited & fragmentary nature of our visible world of perception & experience as scaled against the outside abyss of unthinkable galaxies & unplumbed dimensions—an abyss wherein our solar system is the merest dot... The time has come when the normal revolt against time, space, & matter must assume a form not overtly incompatible with what is known of reality—when it must be gratified by images forming supplements rather than contradictions of the visible & measurable universe. And what, if not a form of non-supernatural cosmic art, is to pacify this sense of revolt—as well as gratify the cognate sense of curiosity?