A not less prejudicial element emanated from the revived philosophies of Greece, which now arrested attention and divided the speculations of learned men. That derived from Aristotle, and known to Europe through the sages of Arabia, had long occupied the cloisters, where alone mind was then exercised, or its operations studied. The rival system of Plato came directly from its native soil; and was first publicly taught in Italy early in the fifteenth century, by Gemistus Plato,[*67] of Constantinople. It attracted the notice of Cosimo PATER PATRIÆ, who after having Marsilio Ficino, son of his physician, grounded in its mysteries by Greeks of learning, placed him at the head of an academy in Florence, instituted by himself for the dissemination of its doctrines. From thence these radiated, absorbing the attention of literary men, and enlisting many converts from the Stagirite faith. Aristotle and Plato became the watchwords of contending sects,[*68] and the usual jarring results of such logomachy were not long wanting. The merits of a question, at first exaggerated by its respective zealots, were lost sight of in the torrent of abuse which gradually superseded argument, and inflamed every evil passion. Far overleaping the legitimate limits or literary warfare, disputant logicians advanced from replies to libels, from words to blows, and, after exhausting the armoury of invective, had recourse to the dagger. But on a subject so painful we are not called to enter. Backed by the authority of Nicholas V., the zeal of Cardinal Bessarion, and the example of the Medici, the sublime and imaginative speculations of Platonism for a time prevailed over the more material system of the Stagirite, and Florence became their head-quarters. The human mind, unaided by revelation, has never invented any system so abstractly beautiful, so pure in its morals, so elevating in its conceptions, so harmonious in its conclusions. Its lofty ethics rank next to the doctrines of inspiration, for it taught that happiness is the natural result of virtue, and that the mischiefs entailed by the passions are ill repaid by their transient pleasures. Yet, though thus intrinsically calculated to ennoble and refine the heart of fallen man, the Platonic theories indirectly led to lamentable results, both to the religion and the morality of the age. The divine revelation was by them virtually superseded, and paganism, from an affectation, became a conviction, or, at the least, a prevailing fashion, warping the manners and phrases, the faith and spirit of the age. Men lived for the present world by the light of human reason, until they forgot or denied a future existence, and a holier wisdom. The first blow struck at this practical heathenism came from Paul II., a Venetian, who was behind the age in its knowledge, as well as in its extravagances, and who relentlessly persecuted what he had not the capacity to redargue. Mind was, however, no longer to be silenced by papal bulls, or