Reflecting on the knowledge of God in the Old and the New Covenant offers us anew way to address the theological status of the philosophical proofs for theexistence of God. In the treatise De Deo Uno of the Summa, Aquinas discusseshow the intellect experiences its natural capacity to know God. The “five ways”are inseparable from one another. In the prologue to the Lectura on Saint John,Aquinas‟s last Gospel commentary, the Doctor Angelicus praises the depth of theevangelist‟s contemplation by comparison with (...) pagan philosophical knowledgeof God, relating it to Isaiah‟s vision of God in the Temple in Jerusalem .“I saw the Lord on an elevated throne” . . . . Saint John‟s vision focuseson the authority and power of the Word: “I saw the Lord,” on hiseternity: “the Lord was seated;” on the excellence and nobility of hisnature: “I saw the Lord seated on a throne;” on his incomprehensibletruth: “an elevated throne.”2Bringing to light the unity of the knowledge of God in the Old and the NewCovenant, Aquinas continues: “It is through these ideas that the ancientphilosophies rose to knowledge of God.” Thus pagan philosophies becomeconnected with the Evangelist and with the Prophets. Indeed one can recognize inthe fourfold articulation of the contemplation of the Prophet and the Evangelistthe central axis of the “four ways” by which “several philosophies arrived atknowledge of God;” God as the intelligence governing nature ; as theunchangeable principle of all motion ; as supreme cause of being; as intelligence and infinite truth . Aquinas briefly developseach of these ways and concludes with a line of Scripture taken from Isaiah, apsalm, or the New Testament. He then adds: “Such was the contemplation of John who because he had seen the Word in its regulatory authority, its eternity,its excellence, and its incomprehensibility, wanted in his Gospel to transmit to ussomething about his contemplation.”3Here, unlike in the commentary on Hebrews 11: 6,4where Aquinasaccents the difference between philosophical knowledge of God and faith,Aquinas emphasizes the unity of the motion of the intellect seeking God, whetherit is philosophical or theological. These two ways of emphasis do not contradicteach other. The natural knowledge which a human being has of God receivesconfirmation and fulfilment in the revelation given to the prophets and to theapostles in the Old and the New Covenant. The fulfilment of the knowledge ofGod by philosophers transforms their “proofs” of God‟s existence by witnessingto the motion by which the human intellect is naturally drawn toward God itscreator. For natural knowledge of God, the intellect leads itself to the conclusions and, in a certain way, “walks forward” to encounter faith. Divine revelation transforms the “proofs” into “ways” toHim, who in reality manifests Himself by drawing to Himself the intellectthrough the infinite action by which he creates it. This natural motion is soimportant for Aquinas that in the prologue he suggests that the readers of hisbiblical commentary verify it for themselves. May we not consider that the “fiveways” of Question 2 of the Summa Theologica, the hinge between the definitionof sacra doctrina and the treatise De Deo Uno, play a similar role of theologicalself-verification? (shrink)