Of the Gradual Perfecting of Books

While assiduously seeking out the wisdom of the men of old, according to the counsel of the Wise Man (Eccles. xxxix.): The wise man, he says, will seek out the wisdom of all the ancients, we have not thought fit to be misled into the opinion that the first founders of the arts have purged away all crudeness, knowing that the discoveries of each of the faithful, when weighed in a faithful balance, makes a tiny portion of science, but that by the anxious investigations of a multitude of scholars, each as it were contributing his share, the mighty bodies of the sciences have grown by successive augmentations to the immense bulk that we now behold. For the disciples, continually melting down the doctrines of their masters, and passing them again through the furnace, drove off the dross that had been previously overlooked, until there came out refined gold tried in a furnace of earth, purified seven times to perfection, and stained by no admixture of error or doubt.

For not even Aristotle, although a man of gigantic intellect, in whom it pleased Nature to try how much of reason she could bestow upon mortality, and whom the Most High made only a little lower than the angels, sucked from his own fingers those wonderful volumes which the whole world can hardly contain. But, on the contrary, with lynx-eyed penetration he had seen through the sacred books of the Hebrews, the Babylonians, the Egyptians, the Chaldaeans, the Persians and the Medes, all of which learned Greece had transferred into her treasuries. Whose true sayings he received, but smoothed away their crudities, pruned their superfluities, supplied their deficiencies, and removed their errors. And he held that we should give thanks not only to those who teach rightly, but even to those who err, as affording the way of more easily investigating truth, as he plainly declares in the second book of his Metaphysics. Thus many learned lawyers contributed to the Pandects, many physicians to the Tegni, and it was by this means that Avicenna edited his Canon, and Pliny his great work on Natural History, and Ptolemy the Almagest.

For as in the writers of annals it is not difficult to see that the later writer always presupposes the earlier, without whom he could by no means relate the former times, so too we are to think of the authors of the sciences. For no man by himself has brought forth any science, since between the earliest students and those of the latter time we find intermediaries, ancient if they be compared with our own age, but modern if we think of the foundations of learning, and these men we consider the most learned. What would Virgil, the chief poet among the Latins, have achieved, if he had not despoiled Theocritus, Lucretius, and Homer, and had not ploughed with their heifer? What, unless again and again he had read somewhat of Parthenius and Pindar, whose ............