Latin text
PRIMA PARS SUMMMA THEOLOGICAE ANGELICI DOCTORIS SANCTI THOMAE AQUINATIS …
Aquinas, Prologus. Text: The Latin Library (thelatinlibrary.com), used with permission. Changes: HTML markup removed 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.