"There is a great difference between those phenomena which are accepted on faith, and those which are proved by objective determination, though the cause of both may be equally 'rational' once known. And the chief difference is this: that people will treat with disdain such phenomena as are proved by the evidence of the senses, and commonly experienced--while they will defend to the death the reality of a phenomenon which they have neither seen nor experienced. "Faith is as powerful a force as science," he concluded, voice soft in the darkness, "--but far more dangerous."