=The sex and social nature.=--God has given us a sexual nature as well as a social nature. If boys and girls have not learned bad language, engaged in impure thoughts or formed habits of vice, they have been rarely conscious of their sex nature before the dawning of puberty. After puberty the organs of sex are generating a sex life that results in occasional sex consciousness. This is not an injury, not a sin. If we keep our minds pure, avoid everything that would excite these organs, this new sex life will make wonderful changes in every organ of the body, faculty of the mind and power of the soul. The consciousness of sex, or what may be correctly called passion, simply means that we are in possession of creative energy. By keeping the mind pure, taking plenty of physical exercise, mental study and sympathizing with and loving everybody, this sex life will be built into the muscles and brain tissue, giving strength of body, brilliancy of mind and warmth of soul. The developing sex life is slowly and gradually preparing them for fatherhood and motherhood. This preparation is not completed until they are matured. The girl does not mature until she is about twenty and the boy until he is about twenty-four. During the eight years of adolescence for the girl and ten for the boy, she is gradually passing out of girlhood into womanhood and he from boyhood into manhood. During the first half of these periods, she is more girl than woman, he is more boy than man. During these early years the boy may be a manly boy and the girl a womanly girl, but they are still children. They should still play together without any thought of being sweethearts. It is natural for a girl to admire one boy more than she does another because he is gallant, kind and manly. For like reasons, it is natural for small boys to admire one girl more than another. Occasionally these little experiences of admiration take on the more serious form of love. If older people do not encourage or tease them their little spasms of love will soon disappear. It is best for boys and girls not to think of each other as sweethearts and lovers until they are nearer matured.