And a world is to be warned. With such preparation as they can gain, thousands upon thousands of the youth and those older in years should be giving themselves to this work. Already many hearts are responding to the call of the Master Worker, and their numbers will increase. … 
There is no line of work in which it is possible for the youth to receive greater benefit. All who engage in ministry are God’s helping hand. They are co-workers with the angels; rather, they are the human agencies through whom the angels accomplish their mission. Angels speak through their voices, and work by their hands. And the human workers, co-operating with heavenly agencies, have the benefit of their education and experience. As a means of education, what “university course” can equal this? With such an army of workers as our youth, rightly trained, might furnish, how soon the message of a crucified, risen, and soon-coming Saviour might be carried to the whole world! Education page 271