or fortune; they are nothing save the eternal properties of the human soul, rationally discussed by politicians, economists and moral philosophers, and painted as portraits by the poet."[16] Referring to an observation made by Castelvetro, and approving it in part, to the effect that if poetry is a presentiment of the possible it should be preceded by history, imitation of the real, yet finding himself confronted by the difficulty that, nevertheless, poets invariably precede historians, Vico solves the problem by identifying history with poetry: primitive history was poetry, its plot was narration of fact, and Homer was the first historian; or rather "he was a heroic character amongst Greek men, in so far as they poetically narrated their own history."[17] Poetry and history, therefore, are originally identical; or rather, undifferentiated. "But inasmuch as it is not possible to give false ideas, since falsity arises from an embroiled combination of ideas, so is it impossible to give a tradition, however fabulous, that has not had, at the beginning, a basis of truth."[18] Hence we gain an entirely new insight into mythology: it is no longer an arbitrary calculated invention, but a spontaneous vision of truth as it presented itself to the spirit of primitive man. Poetry gives an imaginative vision; science or philosophy intelligible truth; history the consciousness of certitude. [Sidenote: _Poetry and language._] Language and poetry are, in Vico's estimation, substantially the same. In refuting the "vulgar error of grammarians" who maintain the priority of the birth of prose over that of verse, he finds "within the origin of Poetry, so far as it has been herein discovered," the "origin of languages and the origin of letters."[19] This discovery was made by Vico after "toil as disagreeable and overwhelming as we should undergo had we to strip off our own nature and enter into that of the primæval men of Hobbes, Grotius, or Puffendorf; creatures possessing no language at all, by whom were created the languages of the ancient world."[20] But his painful labour was richly repaid by his refutation of the erroneous theory that languages sprang from convention or, as he said, "signified at will," whereas it is evident that "from their natural origin words must have had natural meanings; this is plainly seen in common Latin ... wherein almost all words have arisen by natural necessity, either from natural properties or from their sensible effects; and in general, metaphor forms the bulk of language in the case of every people."[21] This argument strikes a blow at another common error of the grammarians, "that the language of prose writers is correct, that of poets incorrect."[22] The poetic tropes grouped under the heading of metonymy seem to Vico to be "born of the nature of primitive peoples, not of capricious selection by men skilled in poetic art";[23] stories told "by means of similitudes, imagery and