So I have now given you a positive and then a negative valuation of Thomas’ doctrine. The positive valuation is that nature and grace are not contradictions, but that grace fulfills what in nature is disrupted, fulfills the possibilities of the natural, and in this I agree with the Thomistic tendency to bring creation and salvation together, to bring nature and grace into the one Divine act of creativity.
Secondly, I deviate from Thomas – or Protestantism does – in that we do not consider a supra-nature as a substance which is “added to” nature in order to fulfill it, but it is the Divine act in which He reunites us with Himself.
This of course is also valid for the relationship of revelation and reason. Revelation does not destroy reason but fulfills reason. And here again I agree with Thomas Aquinas. I believe that revelation is reason in ecstasy, that in revelation the depth of reason breaks into the form of reason, driving it beyond itself without destroying it.
But I would not accept the Thomistic form in which reason is one realm, and revelation is another realm in which reason is completed. So we have two forms here, and I think this is so central that it is an inroad also to the understanding of Protestantism – namely, the central fact that the Catholic world view is essentially dualistic, between nature and supra-nature. Catholicism defends supernaturalism with all its power. Protestantism is united with the Renaissance in the monistic tendency – monistic in the sense of having one Divine world – and having salvation and regeneration (which are one and the same thing) as the answer of God to the disruption of this world. But this answer is not the negation of the created structure of this world.