On the Natural Faculties.

On the Natural Faculties.
By Galen
Edited by: Arthur John Brock (trans.)

Cambridge, Mass. Harvard University Press

Digital Hippocrates Collection Table of Contents


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Καὶ ζητήσομεν κατὰ τόνδε τὸν λόγον, ὑπὸ τίνων γίγνεται δυνάμεων αὐτὰ δὴ ταῦτα καὶ εἰ δή τι ἄλλο φύσεως ἔργον ἐστίν.

Ἀλλὰ πρότερόν γε διελέσθαι τε χρὴ καὶ μηνῦσαι σαφῶς ἕκαστον τῶν ὀνομάτων, οἷς χρησόμεθα κατὰ τόνδε τὸν λόγον, καὶ ἐφ' τι φέρομεν πρᾶγμα. γενήσεται δὲ τοῦτ' εὐθὺς ἔργων φυσικῶν διδασκαλία σὺν ταῖς τῶν ὀνομάτων ἐξηγήσεσιν.

Ὅταν οὖν τι σῶμα κατὰ μηδὲν ἐξαλλάττηται τῶν προϋπαρχόντων, ἡσυχάζειν αὐτό φαμενεἰ δ' ἐξίσταιτό πῃ, κατ' ἐκεῖνο κινεῖσθαι. καὶ τοίνυν ἐπεὶ πολυειδῶς ἐξίσταται, πολυειδῶς καὶ κινηθήσεται. καὶ γὰρ εἰ λευκὸν ὑπάρχον μελαίνοιτο καὶ εἰ μέλαν λευκαίνοιτο, κινεῖται κατὰ χρόαν,
καὶ εἰ γλυκὺ τέως ὑπάρχον αὖθις αὐστηρὸν ἔμπαλιν ἐξ αὐστηροῦ γλυκὺ γένοιτο, καὶ τοῦτ' ἂν κινεῖσθαι λέγοιτο κατὰ τὸν χυμόν. ἄμφω δε ταῦτά τε καὶ τὰ προειρημένα κατὰ τὴν ποιότητα κινεῖσθαι λεχθήσεται καὶ οὐ μόνον γε τὰ κατὰ τὴν χρόαν τὸν χυμὸν ἐξαλλαττόμενα κινεῖσθαί φαμεν, ἀλλὰ καὶ τὸ θερμότερον ἐκ ψυχροτέρου γενόμενον ψυχρότερον ἐκ θερμοτέρου κινεῖσθαι καὶ τοῦτο λέγομεν, ὥσπερ γε καὶ εἴ τι ξηρὸν ἐξ