“The enigma I will not explain – its "dark saying" must be left unguessed, and I warn you that the apparent connection between the variations and the theme is often of the slightest texture.”

Rogers Commission Report (1986)
Context: The acceptance and success of these flights is taken as evidence of safety. But erosion and blow-by are not what the design expected. They are warnings that something is wrong. The equipment is not operating as expected, and therefore there is a danger that it can operate with even wider deviations in this unexpected and not thoroughly understood way. The fact that this danger did not lead to a catastrophe before is no guarantee that it will not the next time, unless it is completely understood. When playing Russian roulette the fact that the first shot got off safely is little comfort for the next. The origin and consequences of the erosion and blow-by were not understood. They did not occur equally on all flights and all joints; sometimes more, and sometimes less. Why not sometime, when whatever conditions determined it were right, still more leading to catastrophe?
In spite of these variations from case to case, officials behaved as if they understood it, giving apparently logical arguments to each other often depending on the "success" of previous flights.

undated quotes, M.C. Escher Foundation
Variant: I walk around in mysteries. Each time, youngsters say: you make Op-art too. I don't know what that is, Op-art. This work I have been making for the past thirty years.

[http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx Response to letter sent by Miss Theodate Johnson, Publisher of Musical America to the two presidential candidates requesting their views on music in relation to the Federal Government and domestic world affairs (13 September 1960); published in Musical America (October 1960), p. 11; later inscribed on the John F. Kennedy Center for the Performing Arts, Washington, D.C.
1960
Context: There is a connection, hard to explain logically but easy to feel, between achievement in public life and progress in the arts. The age of Pericles was also the age of Phidias. The age of Lorenzo de Medici was also the age of Leonardo da Vinci. The age of Elizabeth was also the age of Shakespeare. And the New Frontier for which I campaign in public life, can also be a New Frontier for American art.

Robert Harris, "The Making of Neil Kinnock" (Faber and Faber, 1984), page 208.
Speech in Bridgend, Glamorgan, on Tuesday 7 June 1983. Thursday 9 June 1983 was polling day in the general election.
Context: If Margaret Thatcher is re-elected as prime minister on Thursday, I warn you. I warn you that you will have pain – when healing and relief depend upon payment. I warn you that you will have ignorance – when talents are untended and wits are wasted, when learning is a privilege and not a right. I warn you that you will have poverty – when pensions slip and benefits are whittled away by a government that won’t pay in an economy that can't pay. I warn you that you will be cold – when fuel charges are used as a tax system that the rich don't notice and the poor can't afford.I warn you that you must not expect work – when many cannot spend, more will not be able to earn. When they don't earn, they don't spend. When they don't spend, work dies. I warn you not to go into the streets alone after dark or into the streets in large crowds of protest in the light. I warn you that you will be quiet – when the curfew of fear and the gibbet of unemployment make you obedient. I warn you that you will have defence of a sort – with a risk and at a price that passes all understanding. I warn you that you will be home-bound – when fares and transport bills kill leisure and lock you up. I warn you that you will borrow less – when credit, loans, mortgages and easy payments are refused to people on your melting income.If Margaret Thatcher wins on Thursday, I warn you not to be ordinary. I warn you not to be young. I warn you not to fall ill. And I warn you not to grow old.

Section 3. A Discussion on Westernization and Modernity: Baudelaire and Habermas http://andishar.blogspot.ca/2014/01/blog-post_28.html
Dialogues on enlightenment and reason (2013)

John G. Bennett (1974) Witness: The Autobiography of John G. Bennett. Tucson: Omen Press, p. 244. Cited in: " Controversial reputation http://gurdjiefffourthway.org/pdf/negative.pdf" on gurdjiefffourthway.org, accessed 2013-04-21

On documentary subject matter, Le Parisien (May, 2003)

On the inspiration for his novel Brother in “Interviews: David Chariandy” https://bookpage.com/interviews/22971-david-chariandy-fiction#.XfgMUulKjcs in BookPage (2018 Aug 1)