As quoted by John M. Kost http://www.mackinac.org/bio.aspx?ID=104 (25 July 1995) in S. 946, the Information Technology Management Reform Act of 1995: hearing before the Subcommittee on Oversight of Government Management and the District of Columbia of the Committee on Governmental Affairs (1996).
This appears to derive from a 1910 advertisement by writer Alfred Henry Lewis for a forthcoming series of biographical articles about Roosevelt: "All activity, Mr. Roosevelt has often shown that it is better to do the wrong thing than do nothing at all. In politics this last is peculiarly true. The best thing is to do the right thing; the next best is to do the wrong thing; the worst thing of all things is to stand perfectly still". (e.g. in La Follette's Magazine https://books.google.com/books?id=RV4CAAAAIAAJ&pg=PA183&dq=%22best+thing%22+%22right+thing%22+%22worst+thing%22+nothing&hl=en&sa=X&ved=0ahUKEwjNksu-nZrMAhVDy2MKHSl1Df8Q6AEIIzAB#v=onepage&q=%22the%20best%20thing%20is%20to%20do%20the%20right%20thing%22&f=false (28 May 1910)
Disputed
“When you are wronged repeatedly, the worst thing you can do is continue taking it--fight back!”
Help us to complete the source, original and additional information
Donald J. Trump 904
45th President of the United States of America 1946Related quotes
“The worst thing a boy can do is ignore a girl when she's loving you with all her heart.”
https://www.goodreads.com/author/quotes/6422617.Liam_Payne
5 April 2016 https://twitter.com/muftimenk/status/717290278785261569
Twitter
Zhuan Falun http://www.falundafa.org/book/eng/zflus.html
“The worst thing you can do is nothing. (re: teaching children with autism)”
Speaking with reporters on April 9, 1962 at F.O.E.'s Welcome Home Dinner; as quoted in "Sidelights on Sports" by Al Abrams, in The Pittsburgh Post-Gazette (Wednesday, April 11, 1962), p. 24
Baseball-related, <big><big>1960s</big></big>