Entry 0203: The Philosophy of the Actus Essendi -- One Universally Valid Philosophy Recommended by Fides et Ratio (XI)
“Without declaring a preference for any school, the Encyclical [Fides et Ratio] recognizes philosophy as the best way to reach the intellectus fidei and to articulate a renewed dogmatic theology: an open and dynamic philosophy of being that is based on the act of being (actus essendi).
“Here it is suggested that one of the greatest limitations of modern enquiry is to have bracketed being, not to have succeeded in positing itself as a philosophy of being, thus encountering greater difficulties in finding the sapiential dimension proper to philosophical thought and in addressing the fragmentation of knowledge.” 
↑ Vittorio Possenti, “The Encyclical Letter Fides et Ratio in Relation to Modern and Contemporary Thought,” “Reflections on the Encyclical Fides et Ratio,” no. 17, in L'Osservatore Romano English Weekly Edition, 29 September 1999, p. 10.