Chapter 24
Difference and property have this in common: that they are predicated equally of all the things that participate in them, and that they are always present in the whole species. Distinguishing peculiarities of difference and property are: that, whereas the difference contains several species, the property contains only one; and that the difference is not convertible with the species, whereas the property is.
{Κοινωνία καὶ διαφορὰ διαφορᾶς καὶ ἰδίου.} Κοινὰ διαφορᾶς καὶ ἰδίου: τὸ ἐπίσης κατηγορεῖσθαι πᾶσι τοῖς μετέχουσι: τὸ ἀεὶ καὶ παντὶ τῷ εἴδει παρεῖναι. Ἴδια διαφορᾶς καὶ ἰδίου: ὅτι ἡ μὲν διαφορὰ πολλὰ εἴδη περιέχει, τὸ δὲ ἴδιον ἓν μόνον: ὅτι ἡ διαφορὰ οὐκ ἀντιστρέφει πρὸς τὸ εἶδος, τὸ δὲ ἴδιον ἀντιστρέφει.