Each one from earliest childhood should on every question asked about this subject receive honest answers, suitable for the especial stage of his development. One should be in this way completely enlightened about one's own nature as man or woman, and so acquire a deep feeling of responsibility in relation to one's future duty as man or woman. One should be trained in habits of earnest thought and earnest speaking on this subject. In this way alone can there come into existence a higher type of sex with a higher type of morality. But at the time when Bjoernsen in _Thomas Rendelen_ brought up the question of training youth to purity through intelligence of nature's laws, I objected to his book on the ground that like the purity sermons of Christianity his efforts were rather directed to the mastery of natural impulses than towards their ennoblement. I showed that Bjoernsen certainly brought up two new points of view, that of bodily health, and that of the ennobling of sex. He did not, as Christianity does, stress the spiritual and personal side of the question. These new points of view of his were significant, because they united the just egoism of the individual with the combining altruism produced by the feeling of solidarity. The great purpose of Bjoernsen's book was to transform inherited characteristics as they are related to man's attitude towards morality. So he proposed to create a sound and happy new generation, in which the sufferings of present day sexual discord should be brought to an end. For this purpose he wished the collaboration of the schools. They were to communicate the knowledge of human beings as members of sex, and to instruct their scholars how, as human beings, they should protect themselves and their posterity. I objected at that time to this plan, showing that the school was not the place to lay the foundation for such knowledge. It should be slowly and carefully communicated by the mother herself; the school should only give a theoretical basis. More defective still, I found the question of chastity handled essentially and solely as a question of bodily purity, as a negative not a positive ideal. I maintain that only erotic idealism could awaken enthusiasm for chastity. The basis for such idealism must be found in stories, history, and belles-lettres. Information derived from physiology is, in this respect, very inadequate, unless the imagination and the feeling are moved in the same direction. Neither imagination nor feeling can be helped by natural science and bodily exercises alone, and just as little by Christian religious instruction.