§8.1μῦθος δ’ ἐστὶν εἷς οὐχ ὥσπερ τινὲς οἴονται ἐὰν περὶ ἕνα ᾖ· πολλὰ γὰρ καὶ ἄπειρα τῷ ἑνὶ συμβαίνει, ἐξ ὧν ἐνίων οὐδέν ἐστιν ἕν·
A plot is not one, as some people think, if it is about one person; for many and even countless things happen to one person, from some of which no single thing comes to be.
οὕτως δὲ καὶ πράξεις ἑνὸς πολλαί εἰσιν, ἐξ ὧν μία οὐδεμία γίνεται πρᾶξις.
In the same way, there are also many actions of one person, from which no single action arises.
§8.2διὸ πάντες ἐοίκασιν ἁμαρτάνειν ὅσοι τῶν ποιητῶν Ἡρακληίδα Θησηίδα καὶ τὰ τοιαῦτα ποιήματα πεποιήκασιν· οἴονται γάρ, ἐπεὶ εἷς ἦν ὁ Ἡρακλῆς, ἕνα καὶ τὸν μῦθον εἶναι προσήκειν.
Therefore, all those poets seem to have erred who have composed a Heracleid, a Theseid, and such poems; for they think that, since Heracles was one person, it is appropriate for the plot also to be one.
§8.3ὁ δ’ Ὅμηρος ὥσπερ καὶ τὰ ἄλλα διαφέρει καὶ τοῦτ’ ἔοικεν καλῶς ἰδεῖν, ἤτοι διὰ τέχνην ἢ διὰ φύσιν· Ὀδύσσειαν γὰρ ποιῶν οὐκ ἐποίησεν ἅπαντα ὅσα αὐτῷ συνέβη, οἷον πληγῆναι μὲν ἐν τῷ Παρνασσῷ, μανῆναι δὲ προσποιήσασθαι ἐν τῷ ἀγερμῷ, ὧν οὐδὲν θατέρου γενομένου ἀναγκαῖον ἦν ἢ εἰκὸς θάτερον γενέσθαι, ἀλλὰ περὶ μίαν πρᾶξιν οἵαν λέγομεν τὴν Ὀδύσσειαν συνέστησεν, ὁμοίως δὲ καὶ τὴν Ἰλιάδα.
But Homer, just as he excels in other respects, seems also to have seen this well, whether through art or through nature; for in composing the Odyssey he did not include everything that happened to Odysseus—such as his being wounded on Parnassus, or his pretending to be mad during the gathering of the army—of which events, the occurrence of one did not make the occurrence of the other necessary or probable. Instead, he constructed the Odyssey around a single action of the kind we mean, and likewise also the Iliad.
§8.4χρὴ οὖν, καθάπερ καὶ ἐν ταῖς ἄλλαις μιμητικαῖς ἡ μία μίμησις ἑνός ἐστιν, οὕτω καὶ τὸν μῦθον, ἐπεὶ πράξεως μίμησίς ἐστι, μιᾶς τε εἶναι καὶ ταύτης ὅλης, καὶ τὰ μέρη συνεστάναι τῶν πραγμάτων οὕτως ὥστε μετατιθεμένου τινὸς μέρους ἢ ἀφαιρουμένου διαφέρεσθαι καὶ κινεῖσθαι τὸ ὅλον·
It is necessary, therefore, that just as in the other imitative arts a single imitation is of a single object, so also the plot, since it is an imitation of an action, should be of a single and moreover of a whole action, and the parts of the incidents should be so constructed that if any part is transposed or removed, the whole is disrupted and disturbed.
ὃ γὰρ προσὸν ἢ μὴ προσὸν μηδὲν ποιεῖ ἐπίδηλον, οὐδὲν μόριον τοῦ ὅλου ἐστίν.
For that which, whether present or absent, makes no visible difference, is no part of the whole.