63 For the reasons suggested here, it has seemed to me urgent to re-emphasize with this Encyclical Letter the Church's intense interest in philosophy—indeed the intimate bond which ties theological work to the philosophical search for truth. From this comes the Magisterium's duty to discern and promote philosophical thinking which is not at odds with faith. It is my task to state principles and criteria which in my judgement are necessary in order to restore a harmonious and creative relationship between theology and philosophy. In the light of these principles and criteria, it will be possible to discern with greater clarity what link, if any, theology should forge with the different philosophical opinions or systems which the world of today presents.
Source: Fides et Ratio (Vatican.va)