"It cannot be too strongly asserted that the insistence on blind, unreasoning faith is due mainly to the maintenance of a subject-matter upon which there was no knowledge, namely the 'other world'; and that this basis was assumed because of early man's preoccupation with death. It is, unfortunately, quite possible to believe a thing which is contradicted by facts, especially if the facts are not generally known; but if the whole position on which we rested our religions had been visibly opposed by what we did know, even the unthinking masses would, in time, have noticed it."