Plutarch on Perikles
“Perikles was a student of Zeno the Eleatic too, the one who concerned himself with nature in the manner of Parmenides. and who practiced a type of refutational logic which would trap his interlocutor. He was, as Timon of Phlias quipped, “a man whose tongue worked both ways, with irresistible fury, Zeno, a universal prosecutor”.
But the one who spent the most time with Pericles and who chiefly endowed him with a stature and outlook more impressive than any demagogue’s and who totally raised up and praised the worth of his character was Anaxagoras of Klazomene. He was a man people of that time called the Mind because either they were amazed by his understanding which appeared so great and nuanced regarding nature or because he was the first who didn’t make chance or necessity the ruling force of the universe but instead Mind in its pure and simple form…”
διήκουσε δὲ Περικλῆς καὶ Ζήνωνος τοῦ Ἐλεάτου πραγματευομένου περὶ φύσιν, ὡς Παρμενίδης, ἐλεγκτικὴν δέ τινα καὶ δι᾿ ἀντιλογίας κατακλείουσαν εἰς ἀπορίαν ἐξασκήσαντος ἕξιν, ὥσπερ καὶ Τίμων ὁ Φλιάσιος εἴρηκε διὰ τούτων·
Ἀμφοτερογλώσσου τε μέγα σθένος οὐκ ἀλαπαδνὸν /Ζήνωνος, πάντων ἐπιλήπτορος.
Ὁ δὲ πλεῖστα Περικλεῖ συγγενόμενος καὶ μάλιστα περιθεὶς ὄγκον αὐτῷ καὶ φρόνημα δημαγωγίας ἐμβριθέστερον, ὅλως τε μετεωρίσας καὶ συνεξάρας τὸ ἀξίωμα τοῦ ἤθους, Ἀναξαγόρας ἦν ὁ Κλαζομένιος, ὃν οἱ τότ᾿ ἄνθρωποι Νοῦν προσηγόρευον, εἴτε τὴν σύνεσιν αὐτοῦ μεγάλην εἰς φυσιολογίαν καὶ περιττὴν διαφανεῖσαν θαυμάσαντες, εἴθ᾿ ὅτι τοῖς ὅλοις πρῶτος οὐ τύχην οὐδ᾿ ἀνάγκην διακοσμήσεως ἀρχήν, ἀλλὰ νοῦν ἐπέστησε καθαρὸν καὶ ἄκρατον…