Geometry (_c_) and
Arithmetic and Music contain truth in their own range of
knowledge, but that knowledge is not the knowledge of piety. The
knowledge of piety is,--to know the law, to understand the
prophets, to believe the Gospel, (and) not to be ignorant of the
Apostles. Moreover the teaching of the grammarians can contribute
to life, provided it has been applied to its higher uses.
Idem:
=From the example of Daniel it is established that it is not a
sin to be learned in profane literature.=[W]
(_n_) Whence Saint Gregory in his LXXXVI Division, and in many places.
(_o_) This entire section should be read with regard to profane
knowledge according to Jerome, and the threefold reason why it should be
acquired is shown: namely that it be not neglected, that it be not
unknown, that it may be refuted[X]. So we read some, as the Old and New
Testament, that we may not neglect them. Some we read (as the Arts) that
we may not be ignorant of them. Some, as the writings of the heretics,
that we may refute them. Some (we read) that they be not neglected, as
the Old Testament.
(_a_) For although of no use yet knowledge of them is necessary, as in
dist. VII. cap. ult.
(_b_) As the books of heretics. As XXIV. quaestio III. cap. ult.
(_c_) Geometry. He does not mention Astronomy because this subject has
fallen into disuse as XXVJ.
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