"If the primitive experience of the ancients could offer reason sufficient arguments for the demonstration of God's existence, with the broadening and deepening of the field of experience itself, the footprint of the Eternal now shines more brightly and clearly in the visible world. It therefore seems worthwhile to re-examine, on the basis of new scientific discoveries, the classic proofs of the Angelic Doctor, especially those derived from the motion and order of the universe; that is, to investigate whether and to what extent a deeper knowledge of the structure of the macrocosm and microcosm contributes to strengthening philosophical arguments; and then to consider, the other hand, whether and to what extent they have been shaken, as is often claimed, by modern physics having formulated new fundamental principles and abolished or modified ancient concepts whose meaning was perhaps considered fixed and defined in the past, such as time, space, motion, causality and substance, concepts that are extremely important for the question that now concerns us. Rather than a revision of the philosophical proofs, it is therefore a question here of scrutinising the physical bases — and we shall necessarily have to restrict ourselves to only a few, for reasons of time — from which those arguments derive. Nor are there any surprises to be feared: science itself does not intend to leave that world which, today as yesterday, presents itself with those five ‘modes of being’ from which the philosophical demonstration of the existence of God takes its starting point and its strength."