Ancient Greek text
<Ορᾶξις α΄.>. Οἱ τῶν τὴς φιλοσοφίας λόγων ἐρῶντες καὶ τῆς ἐκ τούτων …
Davidis Prolegomena et in Porphyrii Isagogen Commentarium, Reimer, Berlin, 1904
David the Invincible, Prolegomena philosophiae, ed. Adolf Busse. Text: The Greek Library, from the Perseus Digital Library and other open sources, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
Texts from The Greek Library and the Perseus Digital Library, under CC BY-SA 4.0 and CC BY 4.0. Divided into reading sections by Interlinea.