Such is the metaphysical importance of memory that it gives us the key to existence. For what is the once so real-seeming world of the now-shadowing past when recalled again into being by its magical power but a procession and collection of mental images of like texture to a dream? Did it not then exist like a common dream only in the consciousness of all its creatures? And do not the places and things and persons take on a curiously dream-like character when we bring it back into remembrance? Thus we have to step out of the past, which means to step out of the chains of time, before we can discover the essential mentalness of all our experience.
-- Notebooks Category 21: Mentalism > Chapter 2: The World As Mental > # 115