“We shall not cease from explorationAnd the end of all our exploringWill be to arrive where we startedAnd know the place for the first time.Through the unknown, remembered gateWhen the last of earth left to discoverIs that which was the beginning;At the source of the longest riverThe voice of the hidden waterfallAnd the children in the apple-treeNot known, because not looked forBut heard, half-heard, in the stillnessBetween two waves of the sea.—T.S. Eliot, from “Little Gidding,” Four Quartets (Gardners Books; Main edition, April 30, 2001) Originally published 1943.”