Atrox Fabulinus, the Roman Rabelais, once broke off the account of his hero Raphaelus in the act of opening a giant goose egg to fry it in an iron sk… - R. A. Lafferty

Science Fiction is a group of symptoms and not a disease,” so a medical student (failed) told me once. “It's like the old disease hydropsy that doctors treated for so long before discovering that it was only a collection of symptoms, sometimes for a heart disease, sometimes for a liver or kidney disease, or sometimes even for a septic throat.”
Well, the symptoms for Science Fiction are a prowling avidity to search out and read certain occult texts; an uneasiness or excitement that permates the whole routine of life; it's the ‘itchy ears’, as mentioned in Scripture, seeking for ‘new things’. The symptoms are usually a falcon-like hunting or questing; a series of sudden tuneful encounters; a group of euphorias and buoyancies that cry in opposite directions to be hoarded like misers' treasures and simultaneously to be shared with fellow sufferers of the symptoms; feeling that the ‘World We Live In’ is somehow masked and needs to be unmasked. These and other symptoms indicate either a strange disease or diseases, or they indicate a perpetually new kind of health.
Tracing the symptoms back to the ‘disease’ does indicate that the disease is multiple, that it has such names as Hard Science Fiction, Soft Science Fiction, High Fantasy, Low Fantasy, Non-Conforming Adventure Fiction. And sometimes it bears such non-consensus names as Biological Fiction, Ontological Fiction, Eschatological Fiction (did Teilhard, for instance, know that he was writing Eschatological Fiction?), Theological Fiction, or Psychological or Philosophical or Technological or Geological or Historical Fiction. These things and many others share the same complex of symptoms.

It is a southern river town with some pretensions of being a city... And like every southern river town it has its canker....
The capital has its own orneriness, as pervading as the others, but it isn't the same sort. It never was a fun town. It is not a robust sin town. Its fleshpots have no real juice in them. Its vices are effete and heterodox, and its moral rot is a dry one. Though its people have come from all parts, yet they are not all sorts of people. They are very much of one sort. The ethic climate here nurtures an ancient, evil, shriveled thing. It is of the inhabitants of this city that the prophet spoke:
Of those who do not have the faith
And will not have the fun.

But we are all Goths, for all that, whoever we are; which is to say, Outlanders. And like the Goth Sarus we still owe loyalty to an Empire, but we no longer know of what the Empire consists. We are still bound by the statement of Stilicho that the highest duty in the World is the proper ordering of the World. There will be, and are, other worlds; and perhaps it is not a terrible thing that a world should end. But we are still in admiration at the great corpse of it.