John's work The Fount of Knowledge reinforced the belief that orthodox, biblical Christianity was a religion of rationality… . This is how he opened his first treatise: “Nothing is more estimable than knowledge, for knowledge is the light of the rational soul.”
And so it was that St. Augustine (AD 354-430) and the St. Boethius (ca. AD 480-524) “played the most important roles in preserving logic and laying hte intellectual foundations of medieval and modern Western civilization,” according to Mangalwadi.