“In the White House, you never worry about the law. I never worried about the law, about breaking the law. This never entered my mind, and I doubt it ever entered the minds of people who asked me to do things - maybe for a little bit after Nixon resigned, but it evaporated almost immediately. My thinking was, if the President wants it done, it's right. I never questioned it. It never occurred to me that some sheriff might show up someday with a warrant.”

The Paris Review interview (2010)
Context: My passions drive me to the typewriter every day of my life, and they have driven me there since I was twelve. So I never have to worry about schedules. Some new thing is always exploding in me, and it schedules me, I don’t schedule it. It says: Get to the typewriter right now and finish this.

Wilkes' Case (1763), 19 How. St. Tr. 1410.

Source: The Last Night of the Earth Poems

Winston Churchill (Author) and Richard Langworth (Editor) (28. Oktober 2008): Churchill by Himself: The Definitive Collection of Quotations. New York: PublicAffairs (1st Edition), page 160. note: See also: 1940s. Passim. Martin Gilbert, The Churchill War Papers, Volume II: Never Surrender, May 1940-December 1940. London: Heinemann, New York: Norton, 1994, page xvi, where Sir Martin writes in his Preface: "Inefficiency, incompetence and negative attitudes roused his ire: I have indicated some examples of this in the Churchill index entry, under “rebukes by.” He did not take kindly to what he called “a drizzle of carping criticism,” or to those officials, military or civilian, who, as he expressed it, “failed to rise to the height of circumstances.” Among his injunctions to his Ministers were, “Don’t let this matter sleep,” and, “I never ‘worry’ about action, but only about inaction.”" note: See also: In a letter, on page 1184 of the above work: Concerning “Operation Compass,” the first major British offensive in North Africa, Churchill wrote to General Dill on 7 December 1940: "If, with the situation as it is, General Wavell is only playing small, and is not hurling on his whole available forces with furious energy, he will have failed to rise to the height of circumstances. I never “worry” about action, but only about inaction." note: Source for all the aforementioned information: Richard M. Langworth (Senior fellow, Hillsdale College Churchill Project, Writer and Historian) (March 4, 2009): Churchill on Action vs. Inaction.
Source: Archived on June 2, 2020 https://web.archive.org/web/20200602062301/https://richardlangworth.com/i-never-worry-about-action-but-only-about-inaction and secured on June 2, 2020 http://archive.is/Xgxu6 from the original https://richardlangworth.com/i-never-worry-about-action-but-only-about-inaction

Alleged source in Plato unknown. Earliest occurrence to have been located is a Tweet from 2011 https://twitter.com/ochocinco/status/93332058864238592.
Disputed

Source: Snuff

After hearing that his brother John F. Kennedy had been assassinated in Dallas, TX, on 22 November 1963, as reported https://books.google.com/books?id=nsOlkJ7yVhMC&q=I+thought+they%27d+get+one+of+us%2C+but+Jack%2C+after+all+he%27s+been+through%2C+never+worried+about+it+I+thought+it+would+be+me.#v=snippet&q=%22I%20thought%20they%27d%20get%20one%20of%20us%22%20%22but%20Jack%2C%20after%20all%20he%E2%80%99d%20been%20through%2C%20never%20worried%20about%20it....%20I%20thought%20it%20would%20be%20me.%22&f=false by Ed Guthman in Peter Collier & David Horowitz's The Kennedys: An American Drama https://www.google.com/search?tbo=p&tbm=bks&q=intitle:%22The+Kennedys%22+inauthor:%22David+Horowitz%22+inauthor:%22Peter+Collier%22&num=50 (1984), ISBN 1893554317, p. 249

Steve Knopper (January 30, 2003) "Far, Far From Utah for The Used", Newsday, Newsday Inc., p. B33.