The child comes into life with the inheritance of the preceding members of the race; and this inheritance is modified by adaptation to the environment. But the child shows also individual variations from the type of the species, and if his own character is not to disappear during the process of adaptation, all self-determined development of energy must be aided in every way and only indirectly influenced by the teacher, who should understand how to combine and emphasise the results of this development. Interference on the part of the educator, whether by force or persuasion, weakens this development if it does not destroy it altogether. The habits of the household, and the child's habits in it must be absolutely fixed if they are to be of any value. Amiel truly says that habits are principles which have become instincts, and have passed over into flesh and blood. To change habits, he continues, means to attack life in its very essence, for life is only a web of habits. Why does everything remain essentially the same from generation to generation? Why do highly civilised Christian people continue to plunder one another and call it exchange, to murder one another en masse, and call it nationalism, to oppress one another and call it statesmanship? Because in every new generation the impulses supposed to have been rooted out by discipline in the child, break forth again, when the struggle for existence--of the individual in society, of the society in the life of the state--begins. These passions are not transformed by the prevalent education of the day, but only repressed. Practically this is the reason why not a single savage passion has been overcome in humanity. Perhaps man-eating may be mentioned as an exception. But what is told of European ship companies or Siberian prisoners shows that even this impulse, under conditions favourable to it, may be revived, although in the majority of people a deep physical antipathy to man-eating is innate. Conscious incest, despite similar deviations, must also be physically contrary to the majority, and in a number of women, modesty--the unity between body and soul in relation to love--is an incontestable provision of nature. So too a minority would find it physically impossible to murder or steal. With this list I have exhausted everything which mankind, since its conscious history began, has really so intimately acquired that the achievement is passed on in its flesh and blood. Only this kind of conquest can really stand up against temptation in every form. A deep physiological truth is hidden in the use of language when one speaks of unchained passions; the passions, under the prevailing system of education, are really only beasts of prey imprisoned in cages.