Rest includes more than sleep. It includes relaxation and learning how to pace your day. Our activities need to balance out each other. If your job is inactive, make sure you exercise in the evening and on weekends. Jesus recognized the need for rest.
Many people complain about sleep difficulties.
Americans gobble down more than 500 tons of sleeping pills annually. We have various body rhythms . Dr. Halburg documented that man also has a seven-day rhythm. He tested a man's heart under controlled conditions and it showed a seven-day rhythm. During the French Revolution, a ten-day week was attempted, but it ended in complete chaos.