This heteronomous theory of history does not always remain merely theory, prologue, or frame, but sometimes operates so as to lead to the mingling of elements that are not historiographical with history, such as, for instance, is the case with the 'speeches' or 'orations' of historical personages, not delivered or not in agreement with what was really said, but invented or arranged by the historian and put into the mouths of the personages. This, in my opinion, has been wrongly looked upon as a survival of the 'epic spirit' in ancient historiography, or as a simple proof of the rhetorical ability of the narrators, because, if the first explanation hold as to some of the popular writers and the second as to certain rhetoricians, the origin of those falsifications was with the greater historians nothing but the fulfilment of the obligation of teaching and counselling accepted by them. But when such ends had been assigned to history, its intrinsic quality of truth and the line of demarcation which it drew between real and imaginary could not but vacillate to some extent, since the imaginary sometimes served excellently well and even better than the real for those ends. And setting aside Plato, who despised all knowledge save that of the transcendental ideas, did not Aristotle himself ask whether the greater truth belonged to history or to poetry? Had he not indeed said that history is 'less philosophical' than poetry? And if so why should not history have availed itself of the aid of poetry and of imagination? In any case, resistance could be opposed to this ulterior perversion by seeking the truth with vigilant eye, and also by reducing the share of the imaginary speeches and other parerga co the smallest dimensions. But it was impossible to dispense with belief in the end of instruction, because it was in any case necessary that history should have some end, and a true end had not been discovered, and the end of instruction performed almost the function of a metaphor of the truth, since it was to some extent the nearest to the truth. In Polybius critical vigilance, scientific austerity, a keen desire for ample and severe history, attain to so high a level that one would feel disposed to treat the historian of Megalopolis like one of those great pagans that medieval imagination admitted to Paradise, or at least to Purgatory, as worthy of having known the true God by extraordinary means and as a reward for their intense moral conscience. But if we envisage the matter with greater calmness we shall have to consign Polybius also to the Limbo where those who "were before Christianity" and "did not duly adore God" are received. They were men of great value and reached the boundary, even touching it, but they never passed beyond.