"It is absurd to think that perspiration is only a physical manifestation. During mental work a particular emanation valuable for the saturation of space issues forth. If bodily perspiration can fertilize the earth, then that of the spirit restores prana by being chemically transformed in the rays of the Sun. Labor is the crown of Light. It is necessary that school pupils remember the significance of labor as a factor of world-creation. As a result of labor there will be steadfastness of consciousness. It is necessary to emphasize strongly the atmosphere of work. (117)"