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" Let us suppose that such a person began by observing those Christian activities which are, in a sense, directed towards this present world. He would find that this religion had, as a mere matter of historical fact, been the agent which preserved such secular civilization as survived the fall of the Roman Empire; that to it Europe owes the salvation, in those perilous ages, of civilized agriculture, architecture, laws, and literacy itself. He would find that this same religion has always been healing the sick and caring for the poor; that it has, more than any other, blessed marriage; and that arts and philosophy tend to flourish in its neighborhood. In a word, it is always either doing, or at least repenting with shame for not having done, all the things which secular humanitarianism enjoins. If our enquirer stopped at this point he would have no difficulty in classifying Christianity—giving it its place on a map of the ‘great religions. "
― C.S. Lewis , God in the Dock: Essays on Theology and Ethics