A clarion call to medical evangelism is due at this time. Thousands, yes, tens of thousands of people today are asleep to the condition of their spiritual and their physical health. They are far from the better way of life and do not sense their peril. Faithful watchmen are needed to point out the way of health and holiness. This little booklet will motivate you to become active in the Lord's service, but lays out the principles necessary for ministering to the needs of many.