Back on Feb. 3rd, ’23 , I alluded to primal sleep.
We experience primal sleep when we fall asleep with a single thought or feeling. Usually, we have a zillion things on our minds. So, corralling all those thoughts down to one won’t be easy. Is it worth the effort ? Only way to know is to experience its effects for oneself.
However, we don’t want to confuse single thought with no-thought. No thought brings the mind and emotion into samadhi. Samadhi sleep results in deep sleep or delta frequency sleep ~ about 1 to 3 hertz cycles per second.
Give primal a whirl and see how it goes. What the mind and emotion focuses on will determine its frequency.
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BTW, falling asleep to Hall is alpha frequency sleep ~ about 8 to 12 hertz. Similar to falling asleep while watching t.v.