Book 20
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When King Alexander knew that he had published those books of the acroatic set, although at that time the king was keeping almost all of Asia in a state of panic by his deeds of arms, and was pressing King Darius himself hard by attacks and victories, yet in the midst of such urgent affairs he sent a letter to Aristotle, saying that the philosopher had not done right in publishing the books and so revealing to the public the acroatic training, in which he himself had been instructed. For in what other way, said he, can I excel the rest, it that instruction which I have received from you becomes the common property of all the world? For I would rather be first in learning than in wealth and power.
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Aristotle replied to him to this purport: Know that the acroatic books, which you complain have been made public and not hidden as if they contained secrets, have neither been made public nor hidden, since they can be understood only by those who have heard my lectures.
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I have added copies of both letters, taken from the book of the philosopher Andronicus. Frag. 662, Rose. I was particularly charmed with the slender thread of elegant brevity in the letter of each.
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You have not done right in publishing your acroatic lectures; for wherein, pray, shall I differ from other men, if these lectures, by which I was instructed, become the common property of all? As for me, I should wish to excel in acquaintance with what is noblest, rather than in power. Farewell.