3 His teaching was drawn, almost exclusively, from the pages of Sacred Scripture and from the Fathers, which he had at hand day and night in his profound meditations: and not from the subtle reasonings of dialecticians and philosophers, which, on more than one occasion, he clearly held in low esteem. It should be remarked that he does not reject that human philosophy which is genuine philosophy, namely, that which leads to God, to right living, and to Christian wisdom. Rather does he repudiate that philosophy which, by recourse to empty wordiness and clever quibbling, is overweening enough to climb to divine heights and to delve into all the secrets of God, with the result that, as often happened in those days, it did harm to the integrity of faith and, sad to say, fell into heresy.
Source: Doctor Mellifluus (Vatican.va)