All Ages for the Lord's Testimony

In the Lord's move on earth, there are two areas of function: fighting the battle and keeping the testimony. According to the picture in the Old Testament, for fighting the battle the Israelites between the ages of twenty and thirty were useful, but for keeping the testimony the older ones, those above the age of thirty, were necessary. This book considers this Old Testament type in relation to the service of the believers of all ages in the New Testament church.