“Seth material” search engine (Jane Roberts)

In your time the periods of high conscious activity would run approximately for three days, followed by a day and a half to four days of inactivity, according to the circumstances. This involves a transfer of conscious energy from a home system to an alien one, and certain more or less automatic changes must be made from system to system, involving the use of brain waves; certain patterns being normal in different systems. There are other brain patterns for example than those discovered by your scientists. The brain patterns simply reflect the kind of mental or psychic activity, and other kinds of activity will give you different patterns.

States of mind are not permanent. Their reflections upon the system are not permanent, generally speaking, though they can be cumulative. It is much easier to pass through such periods if names are not given to symptoms, and many people pass through many so-called diseases without ever being aware of it.