For the corporate capitalist, sleeping is an irksome bother. It is neither cost-effective nor high in productivity, and provides minimal opportunity for social or political advantage. Generally it is experienced as a race to reach unconsciousness with an adequate share of quilt and blankets before one's mate begins to snore. Let us take a furtive peep behind the veil of the mystery of science and see if, as Odin clutching the Runes, we can bring back something of actual value to enhance our daily practice of the Art of Sleeping.
Geomancers understand the cyclical nature of time.
So do physiologists. These are all co-ordinated and synchronized as the music and choreography of ballet. By varying the relative quantities of the opposing hormones serotonin and melatonin, it switches biological cycles on and off, slows them down and speeds them up, and keeps us happy jivers bobbing and weaving to the rhythm of earth-momma's heart beat. That means that it has to check in with mom every single day and reset itself, ensuring a constant synchrony with our environment. The first way that the earthbeat is heard is by responding to natural sunlight.