(3) "The attempts to consecrate affection and to safeguard morality by teaching in public or private schools what is called 'sex-hygiene' will, I believe, prove a failure. I have very little confidence in the restraining or inspiring value of information, as such. I have seen too much of its powerlessness in medical men and students. No one knows so much of the harm of morphine as the physicians do, yet there are more cases of morphine habit among physicians than among any less informed profession. It is, of course, easy to make young children familiar with the facts of maternity and birth. Compared to the ordinary methods of concealment and lying by parents to children about these matters this is doubtless an improvement, but it does almost nothing to meet the moral problems of sex which come up later in the child's life. One may know all about maternity, without knowing anything of the difficulties and dangers of sex. Many have thought that by thorough teaching of the physiology of reproduction in plants and animals we can anticipate and to a considerable extent prevent the dangers and temptations referred to above." It is not proposed "to consecrate affection" or "to safeguard morality" by hygienic knowledge; but simply to protect health. Of course, information will not restrain everybody; but if physicians did not know the dangers of morphine many more would be victims of the drug. Dr. Cabot overlooks the fact that physicians know how to use and obtain morphine, while other professional men do not. Teaching concerning maternity and birth will not directly meet the moral problems of sex, but it will help develop an attitude, "a consecration of the affections," that will guard against the dangers of sex. Such teaching to children is only one of many steps in the scheme of sex-education. No responsible advocate of sex-instruction claims that teaching children concerning the reproduction of animals and plants does anticipate and prevent sexual temptations; but it is a foundation for practical knowledge of human sex problems. I have elsewhere referred to the effect of such studies on attitude. [Sidenote: Contagion of personality.] (4) "The positive moral qualities which make us immune to the dangers of sex are obtainable not through warnings as to dangers, but through the more positive activities just alluded to. All that is most practical and successful in this field of endeavor may be summarized as the _contagion of personality, human or divine_. What is it that keeps any of us straight unless it is the contagion of the highest personalities whom we have known, in man and God?"