The first effect of what used to be called natural philosophy is to fill its devotee with wonder at the marvels of God. This explains why the pursuit of science, so long as it remains superficial, is not incompatible with the most naif sort of religious faith. But the moment the student of the sciences passes this stage of childlike amazement and begins to investigate the inner workings of natural phenomena, he begins to see how ineptly many of them are managed, and so he tends to pass from awe of the Creator to criticism of the Creator, and once he has crossed that bridge he has ceased to be a believer. One finds plenty of neighborhood physicians, amateur botanists, high-school physics teachers and other such quasi-scientists in the pews on Sunday, but one never sees a Huxley there, or a Darwin, or an Ehrlich.