Hear the words of prudence, give heed unto her counsels, and store them in thine heart; her maxims are universal, and all the virtues lean upon her; she is the guide and the mistress of human life.
Aside from that reservation, a fictive tale even has the advantage of manifesting symbolic necessity more purely to the extent that we may believe its conception arbitrary.
A poem generated by its own laws may be unrealized and bad in terms of so-called objective principles of taste, judgement, deduction.