Variant: Change is the law of life. And those who look only to the past or present are certain to miss the future.
“But Goethe tells us in his greatest poem that Faust lost the liberty of his soul when he said to the passing moment: "Stay, thou art so fair." And our liberty, too, is endangered if we pause for the passing moment, if we rest on our achievements, if we resist the pace of progress. For time and the world do not stand still. Change is the law of life. And those who look only to the past or the present are certain to miss the future.”
            1963, Address in the Assembly Hall at the Paulskirche in Frankfurt 
Variant: Change is the law of life. And those who look only to the past or the present are certain to miss the future.
Documents on International Affairs, 1963, Royal Institute of International Affairs, ed. Sir John Wheeler Wheeler-Bennett, p. 36.
        
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John F. Kennedy 469
35th president of the United States of America 1917–1963Related quotes
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Context: "He can look ahead. See what's coming. He can — prethink. Let's call it that. He can see into the future. Probably he doesn't perceive it as the future."
"No," Anita said thoughtfully. "It would seem like the present. He has a broader present. But his present lies ahead, not back. Our present is related to the past. Only the past is certain, to us. To him, the future is certain. And he probably doesn't remember the past, any more than any animal remembers what happened."
"As he develops," Baines said, "as his race evolves, it'll probably expand its ability to prethink. Instead of ten minutes, thirty minutes. Then an hour. A day. A year. Eventually they'll be able to keep ahead a whole lifetime. Each one of them will live in a solid, unchanging world. There'll be no variables, no uncertainty. No motion! They won't have anything to fear. Their world will be perfectly static, a solid block of matter."
"And when death comes," Anita said, "they'll accept it. There won't be any struggle; to them, it'll already have happened."