The importance of this health-bringing agent is in some respects like that of the gospel, because no home, be it Christian. Jewish, or heathen, can afford to be without a copy of it. And the gospel’s first concern being one’s health, this heaven-sent agent is, therefore, the “entering wedge” for Bible and colporteur work, and it will, if rightly used, not only open doors and hearts to the gospel of all time, but also the message of the hour.