The Seeds of Future Worlds

It is indeed as though we had within us a mirror; but one that works differently from the ordinary spatial mirror. For the ordinary mirror reflects what is in front of it in space, whereas the living mirror we carry within us reflects in quite another way. It reflects the sense-impressions we receive, and reflects them in the course of time. Something or other—at some later moment—causes this or that impression to be reflected back again into consciousness, and so we have a memory of a past experience.