Copernicus, Galileo, and even Newton were Platonists. Their basic assumption was that the world is mathematically and rationally structured and that, starting from this assumption, we can decipher it and by experiment can make it equally comprehensible and useful. The innovation consisted in associating Platonism and an empirical approach, ideal and experiment. The experiment is based on an existing interpretive concept, which is then tried out in a practical test, corrected, and opened up to further questions. This mathematical anticipation alone can permit subsequent generalization, the recognition of laws, which then make possible appropriate action. All our ideas about natural science and all practical applications are based on the assumption that the world is ordered according to rational, spiritual laws, is imbued with rationality that can be traced out and copied by our reason. At the same time, however, our perception of it is associated with the test of experience.
—Pope Benedict XVI's Truth and Tolerance (pg. 156-157)