While sitting on the bank of a river one day, I picked up a solid round stone from the water and broke it open. It was perfectly dry in spite of the fact that it had been immersed in water for centuries. The same is true of many people in the Western world. For centuries they have been surrounded by Christianity; they live immersed in the waters of its benefits. And yet it has not penetrated their hearts; they do not love it. The fault is not in Christianity, but in men's hearts, which have been hardened by materialism and intellectualism.