A sum can be put right: but only by going back till you find the error and working it afresh from that point, never by simply going on.
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About C.S. Lewis
C.S. Lewis was a 19th-century British writer, lay theologian, and scholar. Clive Staples Lewis was a British author, literary scholar and Anglican lay theologian. He held academic positions in English literature at both Magdalen College, Oxford (1925–1954), and Magdalene College, Cambridge (1954–1963). Read more on Wikipedia →