Plutarch, Fr. 203, recorded in Themistios’ On the Soul (From Stobaeus, iii.13. 68)
“Others will decide whether Diogenes spoke rightly about Plato “What good is a man who has practiced philosophy for a long time and pissed off no one? Perhaps it is right that the philosopher’s speech has a sweetness that wounds like honey.”
Θεμιστίου περὶ ψυχῆς·
Εἰ μὲν οὖν ὀρθῶς ἐπὶ Πλάτωνος εἶπε Διογένης, “τί δαὶ ὄφελος ἡμῖν ἀνδρὸς ὃς πολὺν ἤδη χρόνον φιλοσοφῶν οὐδένα λελύπηκεν;” ἕτεροι κρινοῦσιν. ἴσως γὰρ ὡς τὸ μέλι δεῖ καὶ τὸν λόγον τοῦ φιλοσόφου τὸ γλυκὺ δηκτικὸν ἔχειν τῶν ἡλκωμένων.
Diogenes Laertius, 10.8
“[Epicurus] used to call Nausiphanes an illiterate jellyfish, a cheat and a whore. He used to refer to Plato’s followers as the Dionysus-flatters; he called Aristotle a waste who, after he spent his interitance, fought as a mercenary and sold drugs. He maligned Protagoras as a bellboy, and called Protagoras Democritus’ secretary and a teacher from the sticks. He called Heraclitus mudman, Democritus Lerocritus [nonsense lord].
Antidorus he called Sannidôros [servile-gifter]. He named the Cynics “Greece’s enemies”; he called the dialecticians Destructionists and, according to him, Pyrrho was unlearned and unteachable.”
πλεύμονά τε αὐτὸν ἐκάλει καὶ ἀγράμματον καὶ ἀπατεῶνα καὶ πόρνην: τούς τε περὶ Πλάτωνα Διονυσοκόλακας καὶ αὐτὸν Πλάτωνα χρυσοῦν, καὶ Ἀριστοτέλη ἄσωτον, <ὃν> καταφαγόντα τὴν πατρῴαν οὐσίαν στρατεύεσθαι καὶ φαρμακοπωλεῖν: φορμοφόρον τε Πρωταγόραν καὶ γραφέα Δημοκρίτου καὶ ἐν κώμαις γράμματα διδάσκειν: Ἡράκλειτόν τε κυκητὴν καὶ Δημόκριτον Ληρόκριτον καὶ Ἀντίδωρον Σαννίδωρον: τούς τε Κυνικοὺς ἐχθροὺς τῆς Ἑλλάδος: καὶ τοὺς διαλεκτικοὺς πολυφθόρους, Πύρρωνα δ᾽ ἀμαθῆ καὶ ἀπαίδευτον.
Cicero, Letter Fragments. Nepos to Cicero IIa
Nepos Cornelius also writes to the same Cicero thus: it is so far away from me thinking that philosophy is a teacher of life and the guardian of a happy life, that I do not believe that anyone needs teachers of living more than the many men who are dedicated to philosophical debate. I certainly see that a great number of those who rush into speeches about restraint and discipline in the classroom live amidst the desire for every kind of vice.”
Nepos quoque Cornelius ad eundem Ciceronem ita scribit: tantum abest ut ego magistram putem esse vitae philosophiam beataeque vitae perfectricem ut nullis magis existimem opus esse magistros vivendi quam plerisque qui in ea disputanda versantur. video enim magnam partem eorum qui in schola de pudore <et> continentia praecipiant argutissime eosdem in omnium libidinum cupiditatibus vivere. (Lactant. Div. inst. 3.5.10)
On Timon, D. L. 9.12
“Antigonos says that Timon was fond of drinking; and, whenever he had free time from philosophizing, he wrote poems”
Ἦν δέ, φησὶν ὁ Ἀντίγονος, καὶ φιλοπότης καὶ ἀπὸ τῶν φιλοσόφων εἰ σχολάζοι ποιήματα συνέγραφε
Seneca, Moral Epistle 3.3
“For this is most shameful (and often brought up against us as a reproach), to deal in the words, and not the actual work, of philosophy.”
hoc enim turpissimum est, quod nobis obici solet, verba nos philosophiae, non opera tractare.