It dealt with a wide variety of subjects, including astronomy, epistemology, mathematics, political philosophy, ethics, metaphysics, ontology, logic, biology, rhetoric and aesthetics.
Niki maurusan sareng makudang mata pelajaran, luiripun Astronomi, Epistemologi, Matematika, Filsafat Politik, Etika, Metafisika, Ontologi, Logika, Biologi, Retorika, lan Estetika.