The external material is then offered, and _left freely_ to the natural individual energies of the children. They choose the objects they prefer; and such preference is dictated by the internal needs of "psychical growth." Each child occupies himself with each object chosen for as long as he wishes; and this desire corresponds to the needs of the intimate maturation of the spirit, a process which demands persevering and prolonged exercise. No guide, no teacher can divine the intimate need of each pupil, and the time of maturation necessary to each; but only leave the child _free_, and all this will be revealed to us under the guidance of nature. * * * * * =Psychical truths=.--It is necessary to adopt a scientific point of view in order to interpret the facts that reveal themselves in children when they are developed upon this system, and to divest oneself completely of the old scholastic conception according to which the progress of the child is assessed according to his proficiency in the various subjects of study. Here, almost like the naturalist, it is essential to observe the development of certain phenomena of life. It is true that we prepare special "external conditions"; but the psychical effects are directly bound up with the spontaneous development of the internal activity of the child. Hence there is no direct correspondence between teacher and child; instruction is certainly not a cause of the effects observed. It is the objects of the method which, as "re-agents," provoke special psychical reactions; these may be summed up as an awakening, as an organization of the personality. Discipline, as the first result of an order establishing itself within, is the principal phenomenon to be looked for as the "external sign" of an internal process that has been initiated.