Chapter 27
Species and accident have this in common: that they are predicated of several things. Differences between species and accident are: that the species is predicated of the essence of a thing, whereas the accident is predicated of its sort; that one may participate in just one species, whereas anyone may participate even in several accidents; that the species is by nature prior to the accidents; and that participation in the species is equal, whereas the accidents admit of more or less.
{Κοινωνία καὶ διαφορὰ εἴδους καὶ συμβεβηκότος.} Κοινὰ εἴδους καὶ συμβεβηκότος τὸ κατὰ πλειόνων κατηγορεῖσθαι. Διαφορὰ εἴδους καὶ συμβεβηκότος: ὅτι τὸ μὲν εἶδος ἐν τῷ τί ἐστι, τὸ δὲ συμβεβηκὸς ἐν τῷ ποῖόν τί ἐστι κατηγορεῖται: ὅτι τοῦ εἴδους ἡ μετοχὴ ἑνός ἐστι, τῶν δὲ συμβεβηκότων καὶ πλειόνων τις μετέχει: ὅτι τὸ εἶδος φύσει πρότερον τῶν συμβεβηκότων: ὅτι τοῦ εἴδους ἡ μετοχὴ ἐπίσης, τὰ δὲ συμβεβηκότα τὸ μᾶλλον καὶ ἧττον ἐπιδέχονται.