therefore evident that, according to this supposition, the police would never have been carried in any society to that degree of perfection, to which it is now arrived. There is not a nation now existing, but, with regard to the action of the mind, must not have continued very inferior to certain savage nations, who have not two hundred different ideas, nor two hundred words to express those ideas; and whose language must consequently be reduced, like that of animals, to five or six different sounds or cries, if we take from it the words bow, arrow, nets, etc., which suppose the use of hands. From whence I conclude, that, without a certain exterior organization, sensibility and memory in us would prove two sterile faculties. We ought to examine if these two faculties, by the assistance of this organization, have in reality produced all our thoughts. But; before we examine this subject, I may possibly be asked whether these two faculties are modifications of a spiritual or a material substance? This question, which has formerly been so often debated by philosophers, and by some persons revived in our time, does not necessarily fall within the limits of my work.---What I have to offer, with regard to the Mind, is equally conformable to either of these hypothesis. I shall therefore only observe that, if the church had not fixed our belief in respect to this particular, and we had been obliged by the light of reason alone to acquire a knowledge of the thinking, principle, we must have granted, that neither opinion is capable of demonstration; and consequently that, by weighing the reasons on both sides, balancing the difficulties, and determining in favor of the greater number of probabilities, we should form only conditional judgments. It would be the fate of this problem, as it hath been of many others, to be resolvable only by the assistance of the calculation of probabilities." Helvetius, on the question "whether genius ought to be considered as a natural gift, or as an effect of education," says:--