From what has been said we draw this corollary welcome to us, but (as we believe) acceptable to few: namely, that no dearness of price ought to hinder a man from the buying of books, if he has the money that is demanded for them, unless it be to withstand the malice of the seller or to await a more favourable opportunity of buying. For if it is wisdom only that makes the price of books, which is an infinite treasure to mankind, and if the value of books is unspeakable, as the premises show, how shall the bargain be shown to be dear where an infinite good is being bought? Wherefore, that books are to be gladly bought and unwillingly sold, Solomon, the sun of men, exhorts us in the Proverbs: Buy the truth, he says, and sell not wisdom. But what we are trying to show by rhetoric or logic, let us prove by examples from history. The arch-philosopher Aristotle, whom Averroes regards as the law of Nature, bought a few books of Speusippus straightway after his death for 72,000 sesterces. Plato, before him in time, but after him in learning, bought the book of Philolaus the Pythagorean, from which he is said to have taken the Timaeus, for 10,000 denaries, as Aulus Gellius relates in the Noctes Atticae. Now Aulus Gellius relates this that the foolish may consider how wise men despise money in comparison with books. And on the other hand, that we may know that folly and pride go together, let us here relate the folly of Tarquin the Proud in despising books, as also related by Aulus Gellius. An old woman, utterly unknown, is said to have come to Tarquin the Proud, the seventh king of Rome, offering to sell nine books, in which (as she declared) sacred oracles were contained, but she asked an immense sum for them, insomuch that the king said she was mad. In anger she flung three books into the fire, and still asked the same sum for the rest. When the king refused it, again she flung three others into the fire and still asked the same price for the three that were left. At last, astonished beyond measure, Tarquin was glad to pay for three books the same price for which he might have bought nine. The old woman straightway disappeared, and was never seen before or after. These were the Sibylline books, which the Romans consulted as a divine oracle by some one of the Quindecemvirs, and this is believed to have been the origin of the Quindecemvirate. What did this Sibyl teach the proud king by this bold deed, except that the vessels of wisdom, holy books, exceed all human estimation; and, as Gregory says of the kingdom of Heaven: They are worth all that thou hast? CHAPTER IV THE COMPLAINT OF BOOKS AGAINST THE CLERGY ALREADY PROMOTED