“When the government seeks to expand its power to spy on us, for example, it should be required to show how the loss of anonymity and freedom will make us safer.”

2009, First Inaugural Address (January 2009)
Context: Nor is the question before us whether the market is a force for good or ill. Its power to generate wealth and expand freedom is unmatched, but this crisis has reminded us that without a watchful eye, the market can spin out of control — and that a nation cannot prosper long when it favors only the prosperous. The success of our economy has always depended not just on the size of our Gross Domestic Product, but on the reach of our prosperity; on our ability to extend opportunity to every willing heart — not out of charity, but because it is the surest route to our common good.

Source: Insecure at Last

2021, February 2021, Remarks by President Biden to Department of Defense Personnel, February 10, 2021

From Her Books, I Have Chosen To Stay And Fight, ACTIVISM

Source: The Living Thoughts Of Kierkegaard

Remarks at the funeral of Rosa Parks (2 November 2005) http://www.democracynow.org/2005/11/3/bernice_king_delivers_remarks_at_rosa
Against New Hampshire not formally naming Martin Luther King, Jr. Day (25 January 1994) http://articles.orlandosentinel.com/1994-01-25/news/9401250477_1_new-hampshire-bernice-king-holiday

Preface (8 May 1686)
Philosophiae Naturalis Principia Mathematica (1687)
Context: The ancients considered mechanics in a twofold respect; as rational, which proceeds accurately by demonstration, and practical. To practical mechanics all the manual arts belong, from which mechanics took its name. But as artificers do not work with perfect accuracy, it comes to pass that mechanics is so distinguished from geometry, that what is perfectly accurate is called geometrical; what is less so is called mechanical. But the errors are not in the art, but in the artificers. He that works with less accuracy is an imperfect mechanic: and if any could work with perfect accuracy, he would be the most perfect mechanic of all; for the description of right lines and circles, upon which geometry is founded, belongs to mechanics. Geometry does not teach us to draw these lines, but requires them to be drawn; for it requires that the learner should first be taught to describe these accurately, before he enters upon geometry; then it shows how by these operations problems may be solved.

2013, Brandenburg Gate Speech (June 2013)

The Tragic Sense of Life (1913), IX : Faith, Hope, and Charity
Context: Faith makes us live by showing us that life, although it is dependent upon reason, has its well spring and source of power elsewhere, in something supernatural and miraculous. Cournot the mathematician, a man of singularly well-balanced and scientifically equipped mind has said that it is this tendency towards the supernatural and miraculous that gives life, and that when it is lacking, all the speculations of reason lead to nothing but affliction of the spirit.... And in truth we wish to live.