Dante was not a Greek scholar, like Grosseteste, but he had a thorough acquaintance with the Holy Scriptures in the Vulgate, and with a large part of the theological and mystical writings of the Middle Age. He was familiar with all the extant works of Aristotle in two Latin translations. He quotes also, and in some cases very frequently, from Classical and post-classical authors of repute. He has thoroughly mastered the Graeco-Arabian Astronomy of his day: so thoroughly, that, to the despair of some of his humbler votaries, he can toy with its ponderous intricacies as with a plaything! Nor must we forget that his studies were conducted in an age when printing had yet to be invented; so that all his reading must needs be done with rare, costly, cumbrous and eye-wearying manuscripts. Well may he, in the _Paradiso_, describe his labours as “emaciating,” and in the _Convivio_ allude to a temporary blindness caused by overstrain.[188] It has been plausibly conjectured that he studied as a boy under the Franciscan Fathers of Sta Croce.[189] The idea that Brunetto Latini (or “Latino”), the author of the “Tesoro” (_Livre dou Tresor_), was the regular preceptor of his youth, however just an inference it may seem from the famous passage in the _Inferno_,[190] is disproved by the exigencies of chronology. And, in the end, he must have been largely self-taught, since his visit to the University of Paris, alleged by Boccaccio, is placed towards the end of his life, when most of his extant work was already done. In his attitude Dante is a traditionalist, but not a blind one; his originality everywhere tends to modify his conservatism. A true son of the thirteenth century, he accepts loyally the traditional authority of Scripture and of Aristotle. He accepts the tradition of the old Roman culture: the “Seven Liberal Arts” of the Trivium and Quadrivium find a place in the scheme of his world and a symbolic significance therein. According to a well-known passage in the _Convivio_[191] these seven sciences correspond to the seven lowest Heavens. The mythology of Greece and Rome, on which the minds of our Public School boys are still fed, are caught up into the scheme of the _Divine Comedy_ as “didactic material” side by side with scenes from history and from Holy Writ. The Ptolemaic system of the universe is accepted; but Dante uses his own genius freely in the handling of details, adorning the vast framework with a symbolism of his own, and spreading over it a network of intense human interest.[192]