Julio Cortázar said this quote

An admirable line of Pablo Neruda’s, “My creatures are born of a long denial,” seems to me the best definition of writing as a kind of exorcism, casting off invading creatures by projecting them into universal existence, keeping them on the other side of the bridge… It may be exaggerating to say that all completely successful short stories, especially fantastic stories, are products of neurosis, nightmares or hallucination neutralized through objectification and translated to a medium outside the neurotic terrain. This polarization can be found in any memorable short story, as if the author, wanting to rid himself of his creature as soon and as absolutely as possible, exorcises it the only way he can: by writing it.