In general The Don Juan in Hell joke, that heaven's prospects are tedious and the devil has the best tunes, though a tired fancy in itself, at least serves to show up a real and a profound difficulty, of providing any model of an unending, supposedly satisfying, state or activity which would not rightly prove boring to anyone who remained conscious of himself and who had acquired a character, interests, tastes and impatiences in the course of living, already, a finite life.