For you to stay healthy, each system in your body and mind must balance two conflicting needs. On the one hand, it must remain open to inputs during ongoing transactions with its local environment (Thompson 2007); closed systems are dead systems. On the other hand, each system must also preserve a fundamental stability, staying centered around a good set-point and within certain ranges—not too hot, nor too cold. For example, inhibition from the prefrontal cortex (PFC) and arousal from the limbic system must balance each other: too much inhibition and you feel numb inside, too much arousal and
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