What I said earlier of my compatriots, I now say to all who were entrusted to my service in the Church: Stand firm in the faith! Do not be confused! Often it seems as if science — on the one hand, the natural sciences; on the other, historical research (especially the exegesis of the Holy Scriptures) – has irrefutable insights to offer that are contrary to the Catholic faith. I have witnessed from times long past the changes in natural science and have seen how apparent certainties against the faith vanished, proving themselves not to be science but philosophical interpretations only apparently belonging to science — just as, moreover, it is in dialogue with the natural sciences that faith has learned to understand the limits of the scope of its affirmations and thus its own specificity. For 60 years now, I have accompanied the path of theology, especially biblical studies, and have seen seemingly unshakeable theses collapse with the changing generations, which turned out to be mere hypotheses: the liberal generation (Harnack, Jülicher, etc.), the existentialist generation (Bultmann, etc.), the Marxist generation. I have seen, and see, how, out of the tangle of hypotheses, the reasonableness of faith has emerged and is emerging anew. Jesus Christ is truly the Way, the Truth, and the Life — and the Church, in all her shortcomings, is truly His Body.
Science can purify religion from error and superstition; religion can purify science from idolatry and false absolutes. Each can draw the other into a wider world, a world in which both can flourish. For the truth of the matter is that the Church and the scientific community will inevitably interact; their options do not include isolation. Christians will inevitably assimilate the prevailing ideas about the world, and today these are deeply shaped by science. The only question is whether they will do this critically or unreflectively, with depth and nuance or with a shallowness that debases the Gospel and leaves us ashamed before history. Scientists, like all human beings, will make decisions upon what ultimately gives meaning and value to their lives and to their work. This they will do well or poorly, with the reflective depth that theological wisdom can help them attain, or with an unconsidered absolutizing of their results beyond their reasonable and proper limits.
"Letter to the Grand Duchess Christina of Tuscany (1615)" (abridged) by Galileo Galilei; Galileo Galilei, Karl Von Gebler, trans., in Galileo Galilei and the Roman Curia ()
Go
As to the arrangement of the parts of the universe, I hold the sun to be situated motionless in the center of the revolution of the celestial orbs while the earth revolves about the sun. They know also that I support this position not only by refuting the arguments of Ptolemy and Aristotle, but by producing many counter-arguments; in particular, some which relate to physical effects whose causes can perhaps be assigned in no other way.