Demosthenes

The arts, indeed, since their object is to bring business or fame, naturally pine away in obscure and mean cities; but virtue, like a strong and hardy plant, takes root in any place, if she finds there a generous nature and a spirit that shuns no labour. Wherefore we also, if we fail to live and think as we ought, will justly attribute this, not to the smallness of our native city, but to ourselves.

However, when one has undertaken to compose a history based upon readings which are not readily accessible or even found at home, but in foreign countries, for the most part, and scattered about among different owners, for him it is really necessary, first and above all things, that he should live in a city which is famous, friendly to the liberal arts, and populous, in order that he may have all sorts of books in plenty, and may by hearsay and enquiry come into possession of all those details which elude writers and are preserved with more conspicuous fidelity in the memories of men. He will thus be prevented from publishing a work which is deficient in many, and even in essential things.