Truth like gold is unaffected in quality by its environment, but the environment of truth does affect the character of the person receiving it. Half truths clothed in obscene language and imparted by the ignorant or vicious have made mental, moral and physical wrecks of millions. The same truth received from a pure mother, noble father, a good book or a wise teacher, safeguards the youth and accomplishes untold good. The purpose of this book is not only to enable parents, teachers and all matured people, to inform themselves more fully concerning the vital facts of life, but it furnishes a specific guide to all parents, who would know how to tell their children the sacred story of life, and counsel intelligently with their sons and daughters at the ages of greatest danger and give them clean, concise and scientific sex instruction with a view to safeguarding them against the demoralizing half truths of vicious or ignorant schoolmates, servants or companions; and to all others of sufficient age, who have an opportunity for service to innocent and helpless children, who would have a wise word at the right time; and to the young man and young woman, married or single, who would avoid the pit-falls lying in the pathway of those ignorant of God’s sacred laws of nature; and to all mankind who seek to make the world better by more intelligent and better living. The author of this book is sacrificing home life, financial interests, and much that is dear to all human hearts, to humanity’s cause. He lectures by day and works and travels by night and is unable to meet half of the calls for service. During engagements of two or three days he labors at night without money and without price in private interviews with young men after his lectures until midnight, one, two, three and four o’clock in the morning, hoping thereby to lend a helping hand to thousands to the end of nobler, purer and better living. In this work he has met with marvelous success. He now hopes to send his vital messages to the four corners of the earth in book form in order that the influence of his work may be felt in wider circles than he may ever hope to reach in personal endeavors. The spirit in which this book has been written is best expressed in the words of Henry Van Dyke: “There is a loftier ambition than merely to stand high in the world. It is to stoop down and lift mankind a little higher. There is a nobler character than that which is merely incorruptible. It is the character which acts as an antidote and preventive of corruption. Fearlessly to speak the words which bear witness to righteousness and truth and purity; patiently to do the deeds which strengthen virtue and kindle hope in your fellow men; generously to lend a hand to those who are trying to climb upward; faithfully to give your support and your personal help to the efforts which are making to elevate and purify the social life of the world.”