Book IX, 202

The book of Theo and Proclus the all-wise. The book exhibits the measurements of the Heavens and the Earth. Theo measures the Heavens and Proclus the Earth, or rather Proclus measures the Earth and Theo the Heavens. Both are worthy of equal praise, and both of them gave and took their respective arguments; for Theo, assuming the learned propositions of Proclus, demonstrates by these the courses of the stars; while Proclus, assuming the demonstrations of Theo, resolves and propounds his positions by their aid. All hail, learned pair! Hail, most excellent Theo, learned in every science, now adorning the city of Alexandria! And thou too, Proclus, hail, last scion of the race of Sarpedon and universally acclaimed !