In AoW
One of the great losses to Western 
Culture is the increasing refusal to accept that there is a Natural Law 
to which we may commonly refer. This is especially problematic in 
pluralistic and secularist societies like the post-Christian West where 
reference to the sacred text of Scripture is not considered 
authoritative by many.
Hence, it has been the long 
practice of the Church, even before secularizing trends to base her 
witness to the truth not only on Scripture but also on Natural Law.
 The recourse to such a basis for discussion is now largely impossible 
for us, as most secularists have adopted a radical skepticism that our 
nature, and that the reality all around us, has anything to say to us in
 terms of the moral life. Thus, little discussion is possible between 
believers and secularists and the impasse is clearly on display in the 
comboxes of blogs such as this and others.
What is the Natural Law? According
 to St. Thomas, the natural law is “nothing else than the rational 
creature’s participation in the eternal law” (I-II.94). There are two 
reason we call this law “natural.” First, because it is set forth in our
 very nature itself, and second, because it is manifested to us by the 
purely natural medium of reason, rather than by supernatural revelation.
 The law, however, we observe does not rest on some particular element 
or aspect of our nature (e.g. only the physical). The standard is our 
whole human nature and also the special ends to which we are directed: 
e.g. justice, truth, rationality, and openness to the eternal.
For example, in observing our overall nature we rightly conclude,
 by the use of reason, that it is wrong to indulge the satisfaction of 
some lower need or tendency in a way that is not properly subordinated 
to the higher goods. We rightly conclude that reason should maintain a 
proper order and balance among our conflicting tendencies and desires.
- - Thus, to nourish our bodies is right; but to indulge our appetite for food to the detriment of our overall bodily health or spiritual life is wrong.
- - Self-preservation is right and good, but there are times to accept dangerous and even deadly undertakings when the well-being of wider society requires it.
- - A glass of wine may be good and relaxing, but it is wrong to drink to intoxication, for it is injurious to health, and deprives one of the use of reason, the guide and dictator of conduct.
- – Theft is wrong, because it subverts the basis of social life and sows fear and distrust; so does lying; and man’s nature requires for its proper development that he live in a state of well functioning society.
- - Sexual pleasure is good, but promiscuity of any sort undermines the family, spreads disease and endangers children in innumerable ways from abortion to being raised in less than the ideal setting of a committed, complimentary, and stable marriage of a mature mother and father. Outside of this ideal setting for children, a host of social ills follow as we well know today.
Note that in these examples, we have not referenced Scripture,
 which is supernatural revelation. Natural Law however is accessed 
through the unaided operation of reason. Founded in our nature and 
revealed to us by our reason, the natural law is known to us in the 
measure that reason brings a knowledge of it home to our understanding. 
The supreme and primary principles (e.g. not to steal, lie, commit 
adultery, murder) are known to every one having the actual use of reason
 and are held in every culture. Another class of conclusions or 
principles are those which are reached only by a more or less complex 
course of reasoning. This would be due to the more complex nature of the
 situation encountered. [1]
Thus, in effect, Natural Law is the law available to us by the use of natural reason.
 It presupposes that the existing world is intelligible, that it 
manifests order, and tends toward a purpose or goal (e.g. sustaining 
life). It presupposes that the natural world is steeped with meaning, 
and maintains a vigorous optimism that we, who are rational creatures, 
can learn from what the natural world and our own human nature testify 
to us.
But this optimism that creation shouts meaning and truth has suffered many serious blows in Western Culture,
 in the wake of the radical doubt and skepticism set in motion by the 
Cartesian revolution of the late 16th and early 17th Centuries. 
Increasingly, many influential Western philosophers came to articulate 
that things are ultimately, meaningless. Many scientists have taken up 
the notion that all the intricate order we can observe is only the 
result of random chance mutations and that the existing world ultimately
 has no real or ultimate meaning; it is just a chance accident. 
Materialists refuse to accept anything beyond physical matter, and 
reject metaphysical concepts such as justice, love, beauty, longing, and
 moral sense as mere emanations of brain synapses ultimately signifying 
nothing. Nihilism and other reductionists tendencies have plagued the 
West and robbed us, collectively speaking of the optimism that we, our 
lives, or the existing world have meaning and something to teach us.
Thus it is we who believe who are left holding the candle
 and who optimistically assert that the existing world is steeped with 
meaning, with teachings, with intelligibility. From the Christian point 
of view, God made all things through his “Word” (who is our Lord Jesus 
Christ). The Greek word Logos points to a kind of “logic” that 
permeates all things and is discoverable to our human reason. The 
universe was “thought into being” and thus we who possess reason are 
able to observe, to recognize, the Law, the reason, and the wisdom that 
underlies and permeates all things.
So, along with the supernatural Book of Sacred Scripture we also have the natural Book of Creation.
 The Church esteems them both as pointing to the one truth. Thus there 
can be no absolute or ultimate conflict between true science and faith. 
As Catholics, we are frequently considered together with our 
Fundamentalist and Evangelical brethren who do not often esteem the Book
 of Creation and Natural Law as we do. There are important distinctions 
that Catholics uniquely make that are often lost on atheists and 
secularists. We do not insist that our moral teachings and most of our 
doctrinal teachings are only available by Scripture, we also strive to 
show them and demonstrate them by way of natural law and that they are 
quite often accessible to reason.
Again we may note with sadness that this avenue is of late shutting down.
 Note because we have changed or moved, but because the world has become
 doubtful and cynical that the existing world or our bodies have 
anything to tell us.
One cannot judge individual hearts to be sure, but
 it is not without  sobriety to suggest that some, if not many, who have
 rejected Natural Law have done so, not out struggle or doubt, but 
because the existence  of any law above them is inconvenient to the 
moral life they wish to  lead. Such judgements may be beyond us in 
individual cases, but  collectively it seems clear that the wholesale 
abandonment of Natural  Law has coincided with the declining West’s 
collective decision to take a  moral holiday.
Perhaps as a prosaic conclusion
 to the Church’s optimism that the created world shouts forth meaning 
and truth we can end with the words of St Athanasius. Certainly he 
writes from the standpoint of faith and his words would matter little to
 a secularist or atheist. But to we who still have that “old time 
religion” it is a good reflection on how creation mystically manifests 
the immanence and wisdom of God.
By his own 
wisdom and Word, who is our Lord and Savior Christ, the all-holy Father 
(whose excellence far exceeds that of any creature), like a skillful 
steersman guides to safety all creation, regulating and keeping it in 
being, as he judges right. It is right that creation should exist as he 
has made it and as we see it happening, because this is his will, which 
no one would deny. For if the movement of the universe were irrational, 
and the world rolled on in random fashion, one would be justified in 
disbelieving what we say. But if the world is founded on reason, wisdom 
and science, and is filled with orderly beauty, then it must owe its 
origin and order to none other than the Word of God.
He is God, the 
living and creative God of the universe, the Word of the good God, who 
is God in his own right…. the Word that created this whole world and 
enlightens it by his loving wisdom….produced the order in all 
creation….and gives order, direction and unity to creation.
By his eternal 
Word the Father created all things and implanted a nature in his 
creatures. He…in his goodness he governs and sustains the whole of 
nature by his Word (who is himself also God), so that under the 
guidance, providence and ordering of that Word, the whole of nature 
might remain stable and coherent in his light. From a Discourse Against the Pagans by Saint Athanasius, bishop (Nn. 40-42: PG 25, 79-83)
 
