Chapter 1

Ἔστω γὰρ ὁ λόγος ὃν φέρεται τὸ φερόμενον, ὃν ἔχει ἡ Α Β πρὸς τὴν ΑΓ· καὶ τὸ μὲν ΑΓ φερέσθω πρὸς τὸ Β, ἡ δὲ Α Β ὑποφερέσθω πρὸς τὴν Η Γ· ἐνηνέχθω δὲ τὸ μὲν Α πρὸς τὸ Δ, ἡ δὲ ἐφ’ ᾗ Α Β πρὸς τὸ Ε. Εἰ οὖν ἐπὶ τῆς φορᾶς ὁ λόγος ἦν ὅν ἡ Α Β ἔχει πρὸς τὴν Α Γ, ἀνάγκη καὶ τὴν Α Δ πρὸςτὴν Α Ε τοῦτον ἔχειν τὸ λόγον.