But the purpose of the present treatise is not to consider all the divers languages even of Europe, but only that of Italy. Yet in Italy alone there is an immense variety of speech, and no one of the varieties is the true Italian language. That true, illustrious, courtly tongue is to be found nowhere in common use, but everywhere in select usage. It is the common speech "freed from rude words, involved constructions, defective pronunciation, and rustic accent; excellent, clear, perfect, urbane, and elect, as it may be seen in the poems of 'Cino da Pistoia and his friend,'"--that friend being Dante himself. They have attained to the glory of the tongue, and "how glorious truly it renders its servants we ourselves know, who to the sweetness of its glory hold our exile as naught."[7] This illustrious language, then, is the select Italian tongue, the tongue of the excellent poets in every part of Italy; and how and by whom it is to be used it is the purpose of this treatise to show.
The second book begins with the doctrine that the best speech is appropriate to the best conceptions; but the best conceptions exist only where there is learning and genius, and the best speech is consequently that only of those who possess them, and only the best subjects are worthy of being treated in it. These subjects fall under three heads: that of utility, or safety, which it is the object of arms to secure; that of delight, which is the end of love; that of worthiness, which is attained by virtue. These are the topics of the illustrious poets in the vulgar tongue; and of these, among the Italians, Cino da Pistoia has treated of love, and his friend (Dante) of rectitude.
The remainder of the second book is given to the various forms of poetry,--the canzone, the ballata, the sonnet,--and to the rules of versification. The work breaks off unfinished, in the middle of a sentence. There were to have been at least two books more; but, fragment as it is, the treatise is an invaluable document in the illustration of Dante's study of his own art, in its exhibition of his breadth of view, and in its testimony to his own consciousness of his position as the master of his native tongue, and as the poet of righteousness. He failed in his estimate of himself only as it fell short of the truth. He found the common tongue of Italy unformed, unstable, limited in powers of expression. He shaped it not only for his own needs, but for the needs of the Italian race. He developed its latent powers, enlarged its resources, and determined its form. The language as he used it is essentially the language of to-day,--not less so than the language of Shakespeare is the English of our use. In his poetic diction there is little that is not in accord with later usage; and while in prose the language has become more flexible, its constructions more varied and complex, its rhythm more perfected, his prose style at its best still remains unsurpassed in vigor, in directness, and in simplicity. Changeful from generation to generation as language is, and as Dante recognized it to be, it has not so changed in six hundred years that his tongue has become strange. There is no similar example in any other modern literature. The force of his genius, which thus gave to the form of his work a perpetual contemporaneousness, gave it also to the substance; and though the intellectual convictions of men have changed far more than their language, yet Dante's position as the poet of righteousness remains supreme.