Sanity is viewed as a matter of getting these fluid portions of the self to play well together, without letting them become rigid or too well defined… - David Brin

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Sanity is viewed as a matter of getting these fluid portions of the self to play well together, without letting them become rigid or too well defined. In human beings, this is best achieved through interaction with other minds — other people — beyond the self. Without the push-back of external beings — outside communities and objective events — the subjective self can get lost in solipsism or fractured delusion.