“Yesterday is not ours to recover, but tomorrow is ours to win or lose.”
“Yesterday is yesterday. If we try to recapture it, we will only lose tomorrow.”
            President Clinton's speech at the 200th anniversary of the University of North Carolina. 
This quote was later used as a sample by electronic duo Cosmic Gate in their track "Tomorrow" 
2000s
        
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Bill Clinton 99
42nd President of the United States 1946Related quotes
“Tomorrow hopes we have learned something from yesterday. ”
“We will not meet the problems of tomorrow by talking about yesterday's concepts.”
                                        
                                        Text of television interview with Mike Wallace, New York, New York, October 17 and 18, 1960, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 310 
1950s, Television interview with Mike Wallace (1960)
                                    
“If we teach today’s students as we taught yesterday’s, we rob them of tomorrow.”
                                
                                    “Yesterday is safe,
Tomorrow's full of danger,
Yesterday's a face I know,
Tomorrow is a stranger.”
                                
                                
                                
                                
                            
"A Spell for Midnight"
“It's all now you see: tomorrow began yesterday and yesterday won't be over until tomorrow.”
                                        
                                        "Tomorrow" (1919), as translated in A Soviet Heretic : Essays by Yevgeny Zamyatin (1970) edited and translated by Mirra Ginsburg 
Context: Yesterday, there was a tsar, and there were slaves; today there is no tsar, but the slaves remain; tomorrow there will be only tsars. We march in the name of tomorrow's free man — the royal man. We have lived through the epoch of suppression of the masses; we are living in an epoch of suppression of the individual in the name of the masses; tomorrow will bring the liberation of the individual — in the name of man. Wars, imperialist and civil, have turned man into material for warfare, into a number, a cipher. Man is forgotten, for the sake of the sabbath. We want to recall something else to mind: that the sabbath is for man.
The only weapon worthy of man — of tomorrows's man — is the word.
                                    
“Excuse our appearances. We are taking apart yesterday, to make way for tomorrow”
Source: Perfect Fifths