The Gospel, the Incarnation is a miracle not of this world. This is why abstract philosophical constructs cannot handle the weight of the Gospel, they end up distorting it. The Gospel comes with its own rationality, one that is funded by the miracle of the Incarnation. The rationality of this world, of the type that the ancient philosophers have developed, 
cannot scratch the surface of the miracle of the Gospel. The world and all of creation is contingent upon this miracle, the Gospel; the world was created for the Gospel, not the other way around. As such, in order to “discover” the meaning, the purpose of this world, the person must be grounded in the concrete of a miracle that has broken into this world in the flesh and blood humanity of Jesus Christ. His life circumscribes and delimits all of history, all of reality. So if the Christian, the theologian wants to think rightly about the things of God they will look over and over again, by the Spirit, through the miracle of the Gospel, the Incarnation. They will think reality through the categories revealed therein rather than from the speculative malaise presented by the profane philosophers among us.