XI. We must not suppose, that in the contests between the aristocratic and popular parties, the aristocracy were always on one side. Such a division is never to be seen in free constitutions. There is always a sufficient party of the nobles whom conviction, ambition, or hereditary predilections will place at the head of the popular movement; and it is by members of the privileged order that the order itself is weakened. Athens in this respect, therefore, resembled England, and as now in the latter state, so then at Athens, it was often the proudest, the wealthiest, the most high-born of the aristocrats that gave dignity and success to the progress of democratic opinion. There, too, the vehemence of party frequently rendered politics an hereditary heirloom; intermarriages kept together men of similar factions; and the memory of those who had been the martyrs or the heroes of a cause mingled with the creed of their descendants. Thus, it was as natural that one of the race of that Clisthenes who had expelled the Pisistratides, and popularized the constitution, should embrace the more liberal side, as that a Russell should follow out in one age the principles for which his ancestor perished in another. So do our forefathers become sponsors for ourselves. The mother of Pericles was the descendant of Clisthenes; and though Xanthippus himself was of the same party as Aristides, we may doubt, by his prosecution of Miltiades as well as by his connexion with the Alcmaeonids, whether he ever cordially co-operated with the views and the ambition of Cimon. However this be, his brilliant son cast himself at once into the arms of the more popular faction, and opposed with all his energy the aristocratic predilections of Cimon. Not yet, however, able to assume the lead to which he aspired (for it had now become a matter of time as well as intellect to rise), he ranged himself under Ephialtes, a personage of whom history gives us too scanty details, although he enjoyed considerable influence, increased by his avowed jealousy of the Spartans and his own unimpeachable integrity. XII. It is noticeable, that men who become the leaders of the public, less by the spur of passion than by previous study and conscious talent--men whom thought and letters prepare for enterprise--are rarely eager to advance themselves too soon. Making politics a science, they are even fastidiously alive to the qualities and the experience demanded for great success; their very self-esteem renders them seemingly modest; they rely upon time and upon occasion; and, pushed forward rather by circumstance than their own exertions, it is long before their ambition and their resources are fully developed. Despite all his advantages, the rise of Pericles was gradual.