I'm working at lot this week and I don't have time/stamina/interest in debating the gentlemen at the atheist blog, just this minute. Plus it's almost Christmas.-- I should have my head examined.
However, you will find below some quotes from Luther re: the roles of faith vs. reason. The picture is from Matt Harrison's blog (without permission, hope it's ok). He took the picture of a wall in the town of Schmalkalden.
1. Reason has its sphere: In temporal things and human relations man is rational enough; there he needs no other light than reason. So God does not teach us in Scripture how to build houses, make clothing, marry, wage wars, sail on the seas, and the like; for there our natural light is sufficient. But in divine things, that is, in those which pertain to God and which must be so performed as to be acceptable to Him and obtain salvation for us, our nature is so star-and stone-blind, so utterly blind, as to be unable to recognize them at all. Reason is presumptuous enough to plunge into these matters like a blind horse.
2. Reason is a candle: Reason is also a light, and a beautiful light. But it cannot show or find the way or the path that will lead from sin and from death to righteousness and to life; it remains in darkness... Thus God's Word is a real sun, giving us an eternal day to live and to be glad. We find this Word very richly and beautifully given in the Psalms. Blessed is he who delights in it and gladly sees this light, for it loves to shine. But moles and bats, that is, the people of the world, do not like it.
3. Everyone knows that he is right: Because of sin everyone of us is, from the days of his youth, accustomed to think that he is right, that his head is the best, and to dislike giving way to another person.
4. You may reason in non-religious subjects: the Holy Scriptures requires no controversialist. God has given other branches of learning: grammar, logic, rhetoric, philosophy, jurisprudence, and medicine. Be wise in these subjects; controvert, search, and ask what is right and wrong.
5. Wrong methodology of reason in religion: We find many who have never heard Christ preached, coarse and wild people, who curse and swear as though they were full of devils; yet they begin their religious thinking by trying to determine Why God does this or that. With their blind reason they rise to the light and measure God by their reason. But we should adopt as our mode of procedure the method which God gave St. Paul and should begin at the foundation. The roof will then take care of itself. Let God rest with His hidden counsel, and do not climb up to the roof with your reason. He does not want to have you come up there; He comes down to you. He has made a ladder, a way, and a bridge, to come to you, and says: I descend from heaven to you and become a man in the body of the virgin Mary. I lie in the manger at Bethlehem. I suffer and die for you. So believe in Me, and have the confidence to accept Me as Him who has been crucified for you.