Konrad Höller, who has given special attention to the sexual question in schools, remarks in relation to physical exercise: "The greatest advantage of physical exercises, however, is not the development of the active and passive strength of the body and its skill, but the establishment and fortification of the authority of the will over the body and its needs, so much given up to indolence. He who has learnt to endure and overcome, for the sake of a definite aim, hunger and thirst and fatigue, will be the better able to withstand sexual impulses and the temptation to gratify them, when better insight and æsthetic feeling have made clear to him, as one used to maintain authority over his body, that to yield would be injurious or disgraceful" (K. Höller, "Die Aufgabe der Volksschule," _Sexualpädagogik_, p. 70). Professor Schäfenacker (id., p. 102), who also emphasizes the importance of self-control and self-restraint, thinks a youth must bear in mind his future mission, as citizen and father of a family. A subtle and penetrative thinker of to-day, Jules de Gaultier, writing on morals without reference to this specific question, has discussed what new internal inhibitory motives we can appeal to in replacing the old external inhibition of authority and belief which is now decayed. He answers that the state of feeling on which old faiths were based still persists. "May not," he asks, "the desire for a thing that we love and wish for beneficently replace the belief that a thing is by divine will, or in the nature of things? Will not the presence of a bridle on the frenzy of instinct reveal itself as a useful attitude adopted by instinct itself for its own conservation, as a symptom of the force and health of instinct? Is not empire over oneself, the power of regulating one's acts, a mark of superiority and a motive for self-esteem? Will not this joy of pride have the same authority in preserving the instincts as was once possessed by religious fear and the pretended imperatives of reason?" (Jules de Gaultier, _La Dépendance de la Morale et l'Indépendance des Moeurs_, p. 153.)