What does it mean?
Everything changes, so we must look ahead. People who think only about today or yesterday will be left behind.
Who said it?
John F. Kennedy: 35th President of the United States (1917–1963). Source: speech in Frankfurt (1963).
Change & growth– John F. Kennedy, speech in Frankfurt (1963)
“Change is the law of life. And those who look only to the past or the present are certain to miss the future.”