Library Diodorus Siculus Library of History, Book II
Chapter 29
Chapter 29: The Chaldaeans and the stars
The training which they receive in all these matters is not the same as that of the Greeks who follow such practices. [4] For among the Chaldaeans the scientific study of these subjects is passed down in the family, and son takes it over from father, being relieved of all other services in the state. Since, therefore, they have their parents for teachers, they not only are taught everything ungrudgingly but also at the same time they give heed to the precepts of their teachers with a most unwavering trust. Furthermore, since they are bred in these teachings from childhood up, they attain a great skill in them, both because of the ease with which youth is taught and because of the great amount of time which is devoted to this study.
[5] Among the Greeks, on the contrary, the student who takes up a large number of subjects without preparation turns to the higher studies only quite late, and then, after labouring upon them to some extent, gives them up, being distracted by the necessity of earning a livelihood; and but a few here and there really strip for the higher studies and continue in the pursuit of them as profit-making business, and these are always trying to make innovations in connection with the most important doctrines instead of following in the path of their predecessors. [6] The result of this is that the barbarians, by sticking to the same things always, keep a firm hold on every detail, while the Greeks, on p449 the other hand, aiming at the profit to be made out of the business, keep founding new schools and, wrangling with each other over the most important matters of speculation, bring it about that their pupils hold conflicting views, and that their minds, vacillating throughout their lives and unable to believe at all with firm conviction, simply wander in confusion. It is at any rate true that, if a man were to examine carefully the most famous schools of the philosophers, he would find them differing from one another to the uttermost degree and maintaining opposite opinions regarding the most fundamental tenets.
English translation by C. H. Oldfather, Loeb Classical Library (1933). Public domain. Digital text via Bill Thayer / LacusCurtius (University of Chicago).