Causa Causarum: C. Kayser, Das Buch von der Erkenntniss der Wahrheit, oder, Der Ursache aller Ursachen, Leipzig 1889; cited by page and line number; as prepared for the Digital Syriac Corpus project with corrections by CAL staff.
On the cosmos and free will: pp. 191-207: The description of the cosmic spheres, their location, functions, and contents