ch. 78
5.78.1
So the Athenians grew in power and proved, not in one respect only but in all, that equality is a good thing. Evidence for this is the fact that while they were under tyrannical rulers, the Athenians were no better in war than any of their neighbors, yet once they got rid of their tyrants, they were by far the best of all. This, then, shows that while they were oppressed, they were, as men working for a master, cowardly, but when they were freed, each one was eager to achieve for himself.
