919. Clean Skin
The skin is a highly-organized membrane, full of minute pores, cells, bloodvessels, and nerves; it imbibes moisture or throws it off, according to the state of the atmosphere and the temperature of the body. It also "breathes," as do the lungs (though less actively). All the internal organs sympathize with the skin.
Therefore
, it should be repeatedly cleansed.
920. Over-Work
Late hours and anxious pursuits exhaust the nervous system, and produce disease and premature death.
Therefore, the hours of labour and study should be short.