We must attack the enemy’s line of communication. What we want is not more little books about Christianity, but more little books by Christians on other subjects—with their Christianity latent. You can see this most easily if you look at it the other way round. Our Faith is not very likely to be shaken by any book on Hinduism. But if whenever we read an elementary book on Geology, Botany, Politics, or Astronomy, we found that its implication were Hindu, that would shake us. It is not the books written in direct defence of Materialism that make the modern man a materialist; it is the materalistic assumptions in all the other books.
C.S. Lewis, God in The Dock, p. 91.