There have been men. . .who got so interested in proving the existence of God that they came to care nothing for God Himself. . .as if the good Lord had nothing to do but exist! There have been some who were so occupied in spreading Christianity that they never gave a thought to Christ. Man! You see it in smaller matters. Did you never know a lover of books who, with all his first editions and signed copies, had lost the power to read them? Or an organizer of charities who had lost all love for the poor? It is the subtlest of all snares. – C. S. Lewis (1898-1963), from The Great Divorce: A Dream (1945), Chapter 9.