Originally Posted by Dave Lane
Initially, rhetoric and grammar remained on the syllabus but knowledge which did not serve the purposes of the Church was suppressed. Mathematics, with its historic link to the 'demonic' philosophy of the Pythagoreans, was especially suspect:
"The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of Hell."
– St. Augustine, De Genesi ad Litteram, Book II, xviii, 37.
Dave, Augustine is talking about astrologers and soothsayers there; not people who thought about math as we know it today.