Platonists and Aristotelians. 13. The cultivation of Greek literature gave rise about this time to a vehement controversy, which had some influence on philosophical opinions in Italy. Gemistus Pletho, a native of the Morea, and one of those who attended the council of Florence in 1439, being an enthusiastic votary of the Platonic theories in metaphysics and natural theology communicated to Cosmo de’ Medici part of his own zeal; and from that time the citizen of Florence formed a scheme of establishing an academy of learned men, to discuss and propagate the Platonic system. This seems to have been carried into effect early in the present decennial period.
Their controversy. 14. Meantime, a treatise by Pletho, wherein he not only extolled the Platonic philosophy, which he mingled, as was then usual, with that of the Alexandrian school, and of the spurious writings attributed to Zoroaster and Hermes, but inveighed without measure against Aristotle and his disciples, had aroused the Aristotelians of Greece, where, as in western Europe, their master’s authority had long prevailed. It seems not improbable that the Platonists were obnoxious to the orthodox party, for sacrificing their own church to that of Rome; and there is also strong ground for ascribing a rejection of Christianity to Pletho. The dispute, at least, began in Greece, where Pletho’s treatise met with an angry opponent in Gennadius, patriarch of Constantinople.[319] It soon spread to Italy; Theodore Gaza embracing the cause of Aristotle with temper and moderation,[320] and George of Trebizond, a far inferior man, with invectives against the Platonic philosophy and its founder. Others replied in the same tone; and whether from ignorance or from rudeness, this controversy appears to have been managed as much with abuse of the lives and characters of two philosophers, dead nearly two thousand years, as with any rational discussion of their tenets. Both sides, however, strove to make out, what in fact was the ultimate object, that the doctrine they maintained was more consonant to the Christian religion than that of their adversaries. Cardinal Bessarion, a man of solid and elegant learning, replied to George of Trebizond in a book entitled Adversus Calumniatorem Platonis; one of the first books that appeared from the Roman press, in 1470. This dispute may possibly have originated, at least in Greece, before 1450; and it was certainly continued beyond 1460, the writings both of George and Bessarion appearing to be rather of later date.[321]
[319] Pletho’s death, in an extreme old age, is fixed by Brucker, on the authority of George of Trebizond, before the capture of Constantinople. A letter, indeed, of Bessarion, in 1462 (Mém. de l’Acad. des Inscript. vol. ii.), seems to imply that he was then living; but this cannot have been the case. Gennadius, his enemy, abdicated the patriarchate of Constantinople in 1458, having been raised to it in 1453. The public burning of Pletho’s book was in the intermediate time; and it is agreed that this was done after his death.
[320] Hody, p. 79, doubts whether Gaza’s vindication of Aristotle were not merely verbal, in conversation with Bessarion; which is however implicitly contradicted by Boivin and Tiraboschi, who assert him to have written against Pletho. The comparison of Plato and Aristotle by George of Trebizond was published at Venice in 1523, as Heeren says, on the authority of Fabricius.
[321] The best account, and that from which later writers have freely borrowed, of this philosophical controversy, is by Boivin, in the second volume of the Memoirs of the Academy of Inscriptions, p. 15. Brucker, iv. 40, Buhle, ii. 107, and Tiraboschi, vi. 303, are my other authorities.
15. Bessarion himself was so far from being as unjust towards Aristotle as his opponent was towards Plato, that he translated his metaphysics. That philosopher, though almost the idol of the schoolmen, lay still in some measure under the ban of the church, which had very gradually removed the prohibition she laid on his writings in the beginning of the thirteenth century. Nicholas V. first permitted them to be read without restriction in the universities.[322]
[322] Launoy, De Varia Aristotelis Fortuna in Academia Parisiensi, p. 44.
Marsilius Ficinus. 16. Cosmo de’ Medici selected Marsilius Ficinus, as a youth of great promise, to be educated in the mysteries of Platonism, that he might become the chief and preceptor of the new academy; nor did the devotion of the young philosopher fall short of the patron’s hope. Ficinus declares himself to have profited as much by the conversation of Cosmo as by the writings of Plato; but this is said in a dedication to Lorenzo, and the author has not, on other occasions, escaped the reproach of flattery. He began as early as 1456, at the age of twenty-three, to write on the Platonic philosophy; but being as yet ignorant of Greek, prudently gave way to the advice of Cosmo and Landino, that he should acquire more knowledge before he imparted it to the world.[323]
[323] Brucker, iv. 50. Roscoe.
Invention of printing. 17. The great glory of this decennial period is the invention of printing, or at least, as all must allow, its application to the purposes of useful learning. The reader will not expect a minute discussion of so long and unsettled a controversy as that which the origin of this art has furnished. For those who are little conversant with the subject, a very few particulars may be thought necessary.