Luther on the superiority of special revelation over natural revelation:
For although he is everywhere and in all creatures and I may find him in stone, fire, water, or rope, since he is assuredly there, yet he does not wish me to seek him apart from the Word, that I should throw myself into fire or water or hang myself with a rope. He is everywhere, but he does not desire that you should seek everywhere but only where the Word is. There if you seek him you will truly find, namely in the Word. These people do not know and see who say that it doesn’t make sense that Christ should be in bread and wine. Of course Christ is with me in prison and the martyr’s death, else where should I be? He is truly present there with the Word, yet not in the same sense as in the sacrament, because he has attached his body and blood to the Word and in bread and wine is bodily to be received [Martin Luther, quoted in Roland Bainton, Here I Stand: A Life of Martin Luther (New York: Abingdon Press, 1950), 224].