The rightful autonomy of the sciences in the Divine ecomony

In recent days some Lay Dominicans here in Cambridge have been considering the relationship, or more precisely, the non-conflict between faith and science. Today, the Office of Readings includes an apposite passage from Gaudium et Spes, Vatican II's Pastoral Constitution on the Church in the Modern World.

Not having read it for too many years (!) I looked it up. Here is the part referenced in the Divine Office today. (Emphasis mine.)

35. Human activity, to be sure, takes its significance from its relationship to man. Just as it proceeds from man, so it is ordered toward man. For when a man works he not only alters things and society, he develops himself as well. He learns much, he cultivates his resources, he goes outside of himself and beyond himself. Rightly understood this kind of growth is of greater value than any external riches which can be garnered. A man is more precious for what he is than for what he has. 

Similarly, all that men do to obtain greater justice, wider brotherhood, a more humane disposition of social relationships has greater worth than technical advances. For these advances can supply the material for human progress, but of themselves alone they can never actually bring it about.

Hence, the norm of human activity is this: that in accord with the divine plan and will, it harmonise with the genuine good of the human race, and that it allow men as individuals and as members of society to pursue their total vocation and fulfil it.

36. Now many of our contemporaries seem to fear that a closer bond between human activity and religion will work against the independence of men, of societies, or of the sciences.

If by the autonomy of earthly affairs we mean that created things and societies themselves enjoy their own laws and values which must be gradually deciphered, put to use, and regulated by men, then it is entirely right to demand that autonomy. Such is not merely required by modern man, but harmonises also with the will of the Creator. For by the very circumstance of their having been created, all things are endowed with their own stability, truth, goodness, proper laws and order. Man must respect these as he isolates them by the appropriate methods of the individual sciences or arts. Therefore if methodical investigation within every branch of learning is carried out in a genuinely scientific manner and in accord with moral norms, it never truly conflicts with faith, for earthly matters and the concerns of faith derive from the same God. Indeed whoever labours to penetrate the secrets of reality with a humble and steady mind, even though he is unaware of the fact, is nevertheless being led by the hand of God, who holds all things in existence, and gives them their identity. Consequently, we cannot but deplore certain habits of mind, which are sometimes found too among Christians, which do not sufficiently attend to the rightful independence of science and which, from the arguments and controversies they spark, lead many minds to conclude that faith and science are mutually opposed.

But if the expression, the independence of temporal affairs, is taken to mean that created things do not depend on God, and that man can use them without any reference to their Creator, anyone who acknowledges God will see how false such a meaning is. For without the Creator the creature would disappear. For their part, however, all believers of whatever religion always hear His revealing voice in the discourse of creatures. When God is forgotten, however, the creature itself grows unintelligible.