Alexander, and most munificently rewarded, as it is universally agreed, both by him and his father Philip, thought it worth while, notwithstanding, to return to Athens, in order to resume the teaching of his school. Teachers of the sciences were probably in those times less common than they came to be in an age or two afterwards, when the competition had probably somewhat reduced both the price of their labour and the admiration for their persons.

The most eminent of them, however, appear always to have enjoyed a degree of consideration much superior to any of the like profession in the present times. The Athenians sent Carneades the Academic, and Diogenes the Stoic, upon a solemn embassy to Rome; and though their city had then declined from its former grandeur, it was still an independent and considerable republic.