As before remarked, the function of maternity, which is the object of the sexual system in woman, when rightly exercised is the most sacred and elevated office which a woman can perform for the world. The woman who is a true mother has an opportunity of doing for the race more than all other human agencies combined. The mother's influence is the controlling influence in the world. The mother molds the character of her children. She can make of their plastic minds almost what she will if she is herself prepared for the work. On the other hand, misuse or abuse of the sexual organism is visited in girls and women, as in boys and men, with the most fearful penalties. Nothing will sooner deprive a girl or young lady of the maidenly grace and freshness with which nature blesses woman in her early years than secret vice. We have the greatest difficulty in making ourself believe that it is possible for beings designed by nature to be pure and innocent, in all respects free from impurity of any sort, to become so depraved by sin as to be willing to devote themselves to so vile and filthy a practice. Yet the frequency with which cases have come under our observation which clearly indicate the alarming prevalence of the practice, even among girls and young women who would naturally be least suspected, compels us to recognize the fact. The testimony of many eminent physicians whose opportunities for observation have been very extensive shows that the evil is enormously greater than people generally are aware. Instructors of the youth, of large experience, assert the same. Nor is the evil greater in America than in some other countries. One writer declares that the vice is almost universal among the girls of Russia, which may be due to the low condition in which the women of that country are kept. Terrible Effects of Secret Vice.--The awful effects of this sin against God and nature, this soul-and-body-destroying vice, become speedily visible in those who are guilty of it. The experienced eye needs no confession on the part of the victim to read the whole story of sinful indulgence and consequent disease. The vice stamps its insignia upon the countenance; it shows itself in the walk, in the changed disposition and the loss of healthy vigor. It is not only impossible for a victim of this sinful practice to hide from the all-seeing eye of God the vileness perpetrated in secret, but it is also useless to attempt to hide from human eyes the awful truth.