ABSTRACT
During the tedious process aesthetic made mistakes which were at once deviations from the truth and attempts to reach it: such were the hedonism of the sophists and rhetoricians of antiquity and of the sensationalists of the eighteenth and second half of the nineteenth century; the moralistic hedonism of Aristophanes, of the Stoics, of the Roman eclectics, of the mediaeval and Renaissance writers. The birth of a science is like that of a living being: its later development consists, like every life, in fighting the difficulties and errors, general and particular, which lurk in its path on every side. The forms of error are numerous in the extreme and mingle with each other and with the truth in complications equally numerous: root out one, another appears in its stead; the uprooted ones also reappear, though never in the same shape.
