The idea of human reason’s positivist self-limitation is used by Benedict XVI and others to characterize an aspect of the long-lasting intellectual situation of Western technological-scientific civilization. Liberating human reason from its positivist self-limitation requires, in general, an overcoming of the historical process of Natural Science’s drifting away from Philosophy. In the case of Physics, it requires a point where both physics and philosophy have to deal together with the same problem. This paper first identifies a problem caused by specific reductionisms in Physics. These reductionisms cause certain deformations of physical knowledge, which in turn makes it desirable for physicists to dispose of an assessment of them. The paper then proposes specific steps in philosophically assessing these reductionisms. Such an assessment in turn is based on common experiential knowledge which is not restricted by any reductionisms. That excludes experiments and, thus, cannot be done with physical means, but only with philosophical ones. All this already constitutes a grain of sand of human reason’s liberation from its positivist self-limitation. It is not any imposition from outside physics, but a desideratum from inside physics. The second purpose of this paper is to briefly present the main ideas of that assessment. Implementing its consequences would bring about an epistemological mindset in Physics as a whole that is open to natural theology. Furthermore, it is suited to mitigate, or even eliminate, a certain quasi-contradiction in a physicist’s mind and professional work. To show that is the third purpose of this paper. Precisely these two issues offer a certain flanking aid to, though not a part of, the Evangelization. More specifically, that flanking aid consists in offering the epistemological mindset of Natural Realism and can be circumscribed by four aspects: the first is a general corroboration of the stance that Natural Realism is the true form of man’s relationship to reality; the second is a sort of contemplative mindset; the third is the elimination or the mitigating of the quasi contradiction referred to in the preceeding paragraph, and which can be called ‘unity of life’. The fourth aspect is a ripe fruit of the three aforementioned: an uncommon quietness and serenity of the spirit.
A short description of the relationship between Physics, Philosophy and Theology is: Physics neglects or passes by Natural Realism, which is the origin of Philosophy. In turn, Natural Realism is backed up by Judeo-Christian revelation. Therefore, Physics neglects or passes by Theology. That relationship between Physics and Theology is widely used as a background for exercising an intense pressure on Theology. The defence of Theology should begin by pointing out certain shortcomings of Physics and formulating a philosophical control of these shortcomings. This is tantamount to turning Physics instead of Theology into a “site under construction”. Only a “controlled” Physics and Theology are adequate discussion partners. The author of this article is a Catholic. However, the ideas expressed are, by and large, acceptable for Orthodox and Lutheran Christians as well, with possible differences only regarding natural theology.