If there ever were men who did not know the laws of nature at all they would have no idea of a miracle and feel no particular interest in one if it were performed before them. Nothing can seem extraordinary until you have discovered what is ordinary. Belief in miracles, far from depending on an ignorance of the laws of nature, is only possible in so far as those laws are known. We have already seen that if you begin by ruling out the supernatural you will perceive no miracles. We must now add that you will equally perceive no miracles until you believe that nature works according to regular laws. If you have not yet noticed that the sun always rises in the East you will see nothing miraculous about his rising one morning in the West.
C. S. Lewis (from Miracles, 1947)