"Every generation is prematurely ready for discoveries which it never sees born, since it does not perceive its own incapacity and the means it lacks for making further discoveries. The repetition of any one manifestation, by impressing itself upon our brains, prepares our minds and renders them less and less incapable of discovering the laws to which this manifestation is amenable. Twenty or thirty years are enough to make the whole world admire a discovery which was treated as madness at the moment when it was made. Even at the present day academic bodies laugh at hypnotism and at homoeopathy. Who knows whether my friends and I, who laugh at Spiritualism, are not in error, just as hypnotized persons are? Thanks to the illusion which surrounds us, we may be incapable of seeing that we deceive ourselves; and, like many persons of unsound mind who stubbornly oppose the truth, we laugh at those who are not of our way of thinking." Struck by this keen thought, which by chance I find adapted to a certain matter with which I have been occupied for some time, I joyfully accept it, without abatement, without any comment which might change its sense; and, confining myself to the fine old rules of chivalry, I make use of it as a challenge. The consequences of this challenge will neither be dangerous nor bloody: we shall fight fairly; and, whatever may be the results of the encounter, whether I succumb or whether I make my opponent yield, it will always be in a friendly way. The result will tend to the improvement of one of the two adversaries and will be in every way useful to the great cause of truth. There is much talk nowadays of a special malady which is found in the human organism. We notice it every day; but we are ignorant of its cause and know not what to call it. The cry is raised that it be subjected to the examination of contemporary science; but science, in reply, only meets the request with the mocking ironical smile of a Pyrrhus, for the precise reason (as you say) that the time is not yet ripe.