Faith in reason is the trust that the ultimate natures of things lie together in a harmony which excludes mere arbitrariness. It is the faith that at the base of things we shall not find mere arbitrary mystery. The faith in the order of nature which made possible the growth of science is a particular example of a deeper faith. — Alfred North Whitehead (British mathematician-philosopher), Science and the Modern World, Free Press, NewYork, 1967 (originally published 1925), available at Google books.
(Snagged from http://www.sciencemeetsreligion.org/)