Now the truth was that Uncle Andrew， who knew nothing about the Wood between the Worlds， had quite a wrong idea about the rings. The yellow ones weren’t “outward” rings and the green ones weren‘t “homeward” rings； at least， not in the way he thought. The stuff of which both were made had all come from the wood. The stuff in the yellow rings had the power of drawing you into the wood； it was stuff that wanted to get back to its own place， the in. between place. But the stuff in the green rings is stuff that is trying to get out of its own place； so that a green ring would take you out of the wood into a world. Uncle Andrew， you see， was working with things he did not really understand； most magicians are. Of course Digory did not realize the truth quite clearly either， or not till later. But when theyhad talked it over， they decided to try their green rings on the new pool， just to see what happened.
