to have come into being. For those things to which belong the generable and having come into being, from these of necessity the eternal and the unoriginate and the infinite are absent. 34. From the same argument. We say that time has come into being, when we perceive the before and after in motion. And we define it by our apprehending them as one thing and another, and that there is something different between them. For when we think of the extremes as different from the middle, and the soul says there are two "nows," the one before and the other after, then we also say that this is time; for what is defined by the "now" seems to be time; for time is the number of motion according to the before and after. Time, then, is not motion, but that in respect of which motion has a number. And here is a sign: we judge the more and the less by number, but more and less motion by time. He who defines the generation of time by the before and after in motion says that neither time nor motion is eternal, unoriginate, and infinite; for if it has come into being, it is neither eternal nor unoriginate, and if it is limited by its own extremities, it is not infinite. 35. From the same argument. The "now" measures time, insofar as it is before and after, and motion follows magnitude, and time follows motion. If the "now" is not a part of time, as he said in the thirty-first chapter, how does it measure time? Either, then, the "now" does not measure time, or it must necessarily be a part of time. And if motion follows magnitude, and time follows motion, then magnitude is generable, just as are motion and time, which follow it. 30. From the same argument. The smallest number of a line in plurality is two or one, but in magnitude there is no smallest; for the smallest in number is one or two, but in magnitude there is no smallest. If the point in the line and the "now" in time are not the smallest part, what else is the point in the line and the "now" in time? But if it is not the smallest part, but a limit, how then is it impossible for the limit to exist without that which is limited, yet it is possible for the point to exist without the line? And if in things in which there is no smallest, there is also no greatest, according to what is the remaining difference of the parts, when the difference of the greatest and the smallest is taken away? 37. From the same argument. So it is clear that things that always are or things that always are not are not in time; for they are not contained by time, nor is their being measured by time. How then have you said that motion is eternal, and time its number? For those things from which time is inseparable, it is not possible for them not to be in time.
γεγονέναι. Oἷς τὸ γενητὸν καὶ τὸ γεγονέναι πρόσεστι, τούτων ἐξ ἀνάγκης τὸ ἀΐδιόν τε καὶ ἄναρχον καὶ τὸ ἄπειρον ἄπεστιν. λδ. Ἐκ τοῦ αὐτοῦ λόγου. Τότε φαμὲν γεγονέναι χρόνον, ὅταν τοῦ προτέρου καὶ ὑστέρου ἐν τῇ κινήσει αἴσθησιν λάβωμεν. Ὁρίζομεν δὲ τῷ ἄλλο καὶ ἄλλο ὑπολαβεῖν αὐτὰ καὶ τὸ μεταξὺ αὐτῶν ἕτε ρον. Ὅταν γὰρ ἕτερα τὰ ἄκρα τοῦ μέσου νοήσωμεν, καὶ δύο εἴπῃ ἡ ψυχὴ τὰ νῦν, τὸ μὲν πρότερον τὸ δὲ ὕστερον, τότε καὶ τοῦτό φαμεν εἶναι χρόνον· τὸ γὰρ ὁριζόμενον τῷ νῦν χρόνος εἶναι δοκεῖ· ἔστι γὰρ ὁ χρόνος ἀριθμὸς κινήσεως κατὰ τὸ πρότερον καὶ ὕστερον. Oὐκ ἄρα κίνησις ὁ χρόνος, ἀλλ' ᾗ ἀριθμὸν ἔχει ἡ κίνησις. Σημεῖον δέ· τὸ μὲν πλεῖον καὶ ἔλαττον κρίνομεν ἀριθμῷ, κίνησιν δὲ πλείω καὶ ἐλάττω χρόνῳ. Ὁ τὴν γένεσιν τοῦ χρόνου τῷ ἐν τῇ κινήσει προτέρῳ καὶ ὑστέρῳ ὁριζόμενος ἀΐδιόν τε καὶ ἄναρχον καὶ ἄπειρον οὔτε τὸν χρόνον λέγει οὔτε τὴν κίνησιν· εἰ γὰρ γέγονεν, οὔτε ἀΐδιόν ἐστιν οὔτε ἄναρχον, καὶ εἰ τοῖς οἰκείοις ἄκροις ἐστὶ περατουμένη, ἄπειρος οὐκ ἔστιν. λε. Ἐκ τοῦ αὐτοῦ λόγου. Τὸ δὲ νῦν τὸν χρόνον μετρεῖ, ᾗ πρότερον καὶ ὕστερον, καὶ ἀκολουθεῖ τῷ μεγέθει ἡ κίνησις, ταύτῃ δὲ ὁ χρόνος. Eἰ οὐκ ἔστι τὸ νῦν μέρος τοῦ χρόνου, καθὼς εἶπεν ἐν τῷ τριακοστῷ πρώτῳ κεφαλαίῳ, πῶς μετρεῖ τὸν χρόνον; Ἢ ἄρα οὐ μετρεῖ τὸν χρόνον τὸ νῦν, ἢ μέρος αὐτὸ ἀνάγκη εἶναι τοῦ χρόνου. Καὶ εἰ ἀκολουθεῖ τῷ μεγέθει ἡ κίνησις, ταύτῃ δὲ ὁ χρόνος, γενητὸν ἄρα τὸ μέγεθος, ὥσπερ ἡ κίνησις καὶ ὁ χρόνος, τὰ ἐκείνῳ ἀκολουθοῦντα. λ. Ἐκ τοῦ αὐτοῦ λόγου. Τῆς γραμμῆς ἐλάχιστος ἀριθμὸς πλήθει μέν ἐστι δύο ἢ μία, μεγέθει δὲ οὐκ ἔστιν ἐλάχιστος· ἐλάχιστος γὰρ κατὰ μὲν ἀριθμόν ἐστιν ὁ εἷς ἢ δύο, κατὰ δὲ μέγεθος οὐκ ἔστιν. Eἰ μὴ ἐλάχιστόν ἐστι μέρος ἐν τῇ γραμμῇ μὲν ἡ στιγμή, ἐν τῷ χρόνῳ δὲ τὸ νῦν, τί ἕτερόν ἐστιν ἡ στιγμὴ ἐν τῇ γραμμῇ καὶ τὸ νῦν ἐν τῷ χρόνῳ; Eἰ δὲ οὐκ ἐλάχιστόν ἐστι μέρος, ἀλλὰ πέρας, πῶς οὖν χωρὶς μὲν τοῦ πεπερασμένου ἀδύνατόν ἐστιν εἶναι τὸ πέρας, χωρὶς δὲ τῆς γραμμῆς ἐν δέχεται εἶναι τὴν στιγμήν; Καὶ εἰ ἐν οἷς οὐκ ἔστι τὸ ἐλάχι στον, ἐν τούτοις οὐδὲ τὸ μέγιστον, κατὰ τί ἡ λοιπὴ διαφορὰ τῶν μερῶν, τοῦ μεγίστου καὶ τοῦ ἐλαχίστου ἀναιρουμένης τῆς διαφορᾶς; λζ. Ἐκ τοῦ αὐτοῦ λόγου. Ὥστε φανερὸν ὅτι τὰ ἀεὶ ὄντα ἢ τὰ ἀεὶ μὴ ὄντα οὐκ ἔστιν ἐν χρόνῳ· οὐ γὰρ περιέχεται ὑπὸ χρόνου, οὐδὲ με τρεῖται τὸ εἶναι αὐτῶν ὑπὸ τοῦ χρόνου. Πῶς οὖν τὴν κίνησιν εἴρηκας εἶναι ἀΐδιον, καὶ τὸν χρό νον ταύτης ἀριθμόν; Ὧν γὰρ ὁ χρόνος ἐστὶν ἀχώριστος, ταῦτα οὐκ ἐνδέχεται μὴ εἶναι ἐν χρόνῳ.