Remarks at the Republican Campaign Picnic at the President's Gettysburg Farm (September 12, 1956). Source: Eisenhower Presidential Library.  Archived https://web.archive.org/web/20210125121539/https://www.eisenhowerlibrary.gov/eisenhowers/quotes from the  original https://www.eisenhowerlibrary.gov/eisenhowers/quotes on January 25, 2021. 
1950s
                                    
“Leadership is the art of getting someone else to do something you want done because he wants to do it.”
            As quoted in The Federal Career Service: A Look Ahead (1954) 
1950s 
Variant: Now I think, speaking roughly, by leadership we mean the art of getting someone else to do something that you want done because he wants to do it.
        
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Dwight D. Eisenhower 173
American general and politician, 34th president of the Unit… 1890–1969Related quotes
                                        
                                         Campaign speech in Michigan (1968) https://books.google.com/?id=uXRx5hGm8zYC&dq="Do+you+want+to+make+a+point+or+do+you+want+to+make+a+change"&pg=PA17 
1960s
                                    
“Motivation is the art of getting people to do what you want them to do because they want to do it.”
                                        
                                         "Copying Is Not Theft: Against Copyright Tyranny (by Nina Paley)" (25 March 2011) https://www.youtube.com/watch?v=l2p_BAjC7C8#t=25m21s<!-- Retrieved 27 February 2013 --> 
Context: You don't deserve to be paid because you choose to do something that somebody else may, or may not, want. If you want to be paid for your work, you negotiate that beforehand. Otherwise I would just be walking around talking. Here I am talking now. "You owe me money", right? … It's up to you whether or not you want to do work with no contract. I think artists do need to do work with no contract, because what we're motivated by is not money. We're motivated by a need to express ourselves and to get our ideas out. That's the motivation. It turns out that when people like it they frequently will support you if you give them a means, but this is not a contract.
                                    
“… no sooner had you done something than someone else appeared who threatened to do it better.”
Living to Tell the Tale (2002)
“Art is just fraud. You just have to do something nobody else has done before.”
                                        
                                        In interview with a Korean newspaper, quoted in: KoreAm Journal, Vol. 17 (2006), p. 79 
1970s
                                    
“Never confuse someone else's inability to do something with its inability to be done.”
Source: Life, the Truth, and Being Free (2010), p. 16
Ordway Tead "The Nature and Use of Creative Leadership". In: Bulletin of the Taylor Society. Vol 12, Nr.3. p. 394.