 Though he regularly draws attention to analogies, Lefèvre does not systematically describe this “secret analogy”. Instead, he often uses analogy to compare the constituent parts of different disciplines (Oosterhoff 2018: 77–85). More circumstantial evidence suggests that members of his circle at least toyed with the idea that analogy could be a more universal science. A student of his, Beatus Rhenanus, included in his course notes several theses concerning how “analogy is the science of sciences”, that “Aristotle claims he finds the secrets of the sciences by analogy”, and “what is known by analogy is known more firmly than by demonstration” (Beatus Rhenanus’s Cahier d’étudiant, Bibliothèque humaniste de Sélestat, MS 50, 253r). This fascination with analogies may explain why Lefèvre appreciated mathematics so much, since ancient number theory focused on the ratios (proportiones in Latin, analogia in Greek) between numbers. For him, analogia sometimes had the ancient Greek meaning of a proportion or ratio between two mathematical objects; at other times, it reflected analogies between the subjects of lower and higher disciplines, as when he argued that mathematical reasoning provided