Galen, On the Opinions of Hippocrates and Plato 9.5.5-7
“For some practice the art of medicine for the money, and some do it for exemption from taxes. But some pursue medicine because of their love for humanity [philanthrôpia] just as there are those who do it for the fame or honor medicine attracts. Therefore doctors are named by the fact that they are all craftsmen of health in common, inasmuch as they perform their craft for different reasons—one will be called a lover of humanity [philanthrôpos], another titled a lover of honor [philotimos], while another is considered a lover of reputation [philodoxos] and another is a money maker.
The aim of a doctor for doctors, then, is not fame or wealth, as Mênodotos the Empiricist wrote. This is a goal for Mênodotus but not for Diocles or Hippocrates or Empedocles nor even a few others of those ancient doctors—however so many ministered to people because of their love of humanity [philanthrôpia]. Left bare among these kind of examples—and they are abundant in Hippocrates and Plato—the particular features and the common traits of each craft may be examined.”
τινὲς μὲν γὰρ ἕνεκα χρηματισμοῦ τὴν ἰατρικὴν τέχνην ἐργάζονται, τινὲς δὲ διὰ τὴν ἐκ τῶν νόμων αὐτοῖς διδομένην ἀλειτουργησίαν, ἔνιοι δὲ διὰ φιλανθρωπίαν, ὥσπερ ἄλλοι διὰ τὴν ἐπὶ ταύτῃ δόξαν ἢ τιμήν. ὀνομασθήσονται τοιγαροῦν ᾗ μὲν ὑγιείας εἰσὶ δημιουργοὶ κοινῇ πάντες ἰατροί, καθόσον δὲ τὰς πράξεις ἐπὶ διαφόροις ποιοῦνται σκοποῖς, ὁ μέν τις φιλάνθρωπος, ὁ δὲ φιλότιμος, ὁ δὲ φιλόδοξος, ὁ δὲ χρηματιστής.
οὔκουν τοῖς ἰατροῖς τὸ τέλος ἐστὶν ὡς ἰατροῖς ἔνδοξον ἢ πόριμον, ὡς Μηνόδοτος <ὁ> ἐμπειρικὸς ἔγραψεν, ἀλλὰ Μηνοδότῳ μὲν τοῦτο, Διοκλεῖ δ’ οὐ τοῦτο, καθάπερ οὐδὲ ῾Ιπποκράτει καὶ ᾿Εμπεδοκλεῖ οὐδ’ ἄλλοις τῶν παλαιῶν οὐκ ὀλίγοις ὅσοι διὰ φιλανθρωπίαν ἐθεράπευον τοὺς ἀνθρώπους. γυμνασάμενος οὖν ἐν τοῖς τοιούτοις τις παραδείγμασι, πάμπολλα δ’ ἐστὶ παρ’ ῾Ιπποκράτει καὶ Πλάτωνι, ῥᾳδίως κατόψεται τά τε ἴδια τέχνης ἑκάστης καὶ τὰ κοινά.