History of the Peloponnesian War

Did not our fathers resist the Medes not only with resources far different from ours, but even when those resources had been abandoned; and more by wisdom than by fortune, more by daring than by strength, did not they beat off the barbarian and advance their affairs to their present height? We must not fall behind them, but must resist our enemies in any way and in every way, and attempt to hand down our power to our posterity unimpaired.’