Cimon was beyond dispute the ablest and most successful general of his day: and his victories had shed a lustre on the arms of Athens, which almost dimmed the glories of Marathon and Salamis. But while he was gaining renown abroad, he had rivals at home, who were endeavouring to supplant him in the affections of the people, and to establish a system of domestic and foreign policy directly counter to his views, and were preparing contests for him in which his military talents would be of little avail. While Themistocles and Aristides were occupying the political stage, an extraordinary genius had been ripening in obscurity, and was only waiting for a favourable juncture to issue from the shade into the broad day of public life. Xanthippus, the conqueror of Mycale, had married Agariste, a descendant of the famous Clisthenes, and had left two sons, Ariphron and Pericles. Of Ariphron little is known beside his name: but Pericles, to an observing eye, gave early indications of a mind formed for great things, and a will earnestly bent on them.
In his youth he had not rested satisfied with the ordinary Greek education, but had applied himself, with an ardour which was not even abated by the lapse of years, nor stifled by his public avocations, to intellectual pursuits, which were then new at Athens, and confined to a very narrow circle of inquisitive spirits. His birth and fortune afforded him the means of familiar intercourse with all the men most eminent in every kind of knowledge and art, who were already beginning to resort to Athens as a common seat of learning. Thus, though Pythoclides taught him to touch the cithara, he sought the elements of a higher kind of music in the lessons of Damon, who was believed to have contributed mainly to train him for his political career: himself no ordinary person; for he was held up by the comic poets to public jealousy, as a secret favourer of tyranny, and was driven from Athens by the process of ostracism. But Pericles also entered with avidity into the abstrusest philosophical speculations, and even took pleasure in the arid subtleties of the Eleatic school, or at least in the ingenuity and the dialectic art with which they were unfolded to him by Zeno. But his principal guide in such researches, and the man who appears to have exercised the most powerful and durable influence on his mind and character, was the philosopher Anaxagoras, with whom he was long united in intimate friendship. Not only his public and private deportment, and his habits of thought, but the tone and style of his eloquence were believed to have been formed by his intercourse with Anaxagoras. It was commonly supposed that this effect was produced by the philosopher’s physical speculations, which, elevating his disciple above the ignorant superstition of the vulgar, had imparted to him the serene condescension and dignified language of a superior being. But we should be loth to believe that it was the possession of such physical secrets as Anaxagoras was able to communicate, that inspired Pericles with his lofty conceptions, or that he was intoxicated with the little taste of science which had weaned him from a few popular prejudices. We should rather ascribe so deep an impression to the distinguishing tenet of the Anaxagorean system, by which the philosopher himself was supposed to have acquired the title of Mind.
It was undoubtedly not for the mere amusement of his leisure that Pericles had enriched his mind with so many rare acquirements. All of them were probably considered by him as instruments for the use of the statesman: and even those which seemed most remote from all practical purposes, may have contributed to the cultivation of that natural eloquence, to which he owed so much of his influence. He left no specimens of his oratory behind him, and we can only estimate it, like many other fruits of Greek genius, by the effect it produced. The few minute fragments preserved by Plutarch, which were recorded by earlier authors because they had sunk deep in the mind of his hearers, seem to indicate that he loved to concentrate his thoughts in a bold and vivid image: as when he called Ægina the eyesore of Piræus, and said that he descried war lowering from the Peloponnesus. But though signally gifted and accomplished for political action, it was not without much hesitation and apprehension that he entered on a field, where he saw ample room indeed for the display of his powers, but also many enemies and great dangers. The very superiority of which he could not but be conscious, suggested a motive for alarm, as it might easily excite suspicion in the people of views adverse to their freedom: and these fears were heightened by some circumstances, trifling in themselves, but capable of awakening or confirming a popular prejudice.