Article 3: Whether Sacred Doctrine is One Science?
Objection 1: It is evident that Sacred Doctrine is not one science. According to the Philosopher in Poster., 1, "Science is one which is of a singular type of subject." However, the Creator and creation, concerning that which is discussed in Sacred Doctrine, are not connected under one type of subject. Therefore, Sacred Doctrine is not one science.
Objection 2: Besides, Sacred Doctrine discusses Angels, bodily creatures, and human laws. However, these belong to different philosophical sciences. Therefore, Sacred Doctrine is not a singular science.
But on the contrary is that Sacred Scripture, concerning this, says it is one science, as Wisdom 10:10 states, "he gave this sacred knowledge."
I respond that Sacred Doctrine is to be considered a singular science. Truly, the singularity of an ability or habit is considered by its object, not in fact, its materiality, but as regards the exact formality under which it is an object, for example, man, ass, and stone assemble in a single formality of being colored, because color is the object of sight. Therefore, because Sacred Scripture is considered something following divine revelation those words, all that are divinely revealed, communicate in one manner the formal object of this knowledge. And therefore it is comprehended under Sacred Doctrine as under one science.
To the first objection, therefore, it is to be said that Sacred Doctrine is not determined about God and creation out of equality but about God principals and about creation secondly because it was made known by God as the beginning and the end. Hence, the unity of knowledge is not impeded.
To the second objection, it is said that nothing prohibits inferior faculties from being differentiated by something which falls under a higher faculty or habit as well because the higher faculty or habit regards the object in its more universal formality. Just as the object of common sense is whatever affects the senses that is comprehended under that which is seen and heard, whence common sense with its one faculty is extended itself to all objects which are perceived through the senses. And similarly, those objects discussed in different philosophical sciences can be considered under this one Sacred Doctrine under one aspect insofar as they are divinely revealed so that this Sacred Doctrine bears the impression of divine science which is one and simple, yet extends to all.