It is in Christianity that our arts have developed; it is in Christianity that the laws of Europe--until recently--have been rooted. It is against a background of Christianity that all of our thought has significance. An individual European may not believe that the Christian faith is true, and yet what he says, and makes, and does will all spring out of his heritage of Christian culture and depend upon that culture for its meaning...I do not believe that culture of Europe could survive the complete disappearance of the Christian faith. And I am convinced of that, not merely because I am a Christian myself, but as a student of social biology. If Christianity goes, the whole culture goes.