“Therefore, it is clear that all the natural arts serve divine science, and that the lower wisdom, rightly ordered, leads to the higher. Accordingly, under the sense of the significance of words in relation to things history is contained, which, as has been said, is served by three sciences: grammar, dialectic, and rhetoric. Under that sense, however, consisting in the significance of things in relation to mystical facts, allegory is contained. And under that sense, consisting in the meaning of things in relation to mystical things to be done, tropology is contained, and these two are served by arithmetic, geometry, astronomy, and physics. Besides these, there is above all that divine science to which the Divine Scripture leads, whether in allegory or in tropology; one division of this which is in allegory, teaches right faith, the other, which is in tropology, teaches good work. In these consist knowledge of truth and love of virtue; and this is the true restoration of man.”
¬ Hugh of St. Victor, “De Sacramentis,” Prologue, VI.