“There is a sort of enthusiasm in all projectors, absolutely necessary for their affairs, which makes them proof against the most fatiguing delays, the most mortifying disappointments, the most shocking insults; and, what is severer than all, the presumptuous judgement of the ignorant upon their designs.”

Paris Review interview (1958)

Speech to the Second National Convention of the Medical Committee for Human Rights – Chicago (25 March 1966), as quoted in Dan Munro, "America's Forgotten Civil Right - Healthcare" http://www.forbes.com/sites/danmunro/2013/08/28/americas-forgotten-civil-right-healthcare/, Forbes (28 August 2013). See also: Amanda Moore, "Tracking Down Martin Luther King, Jr.'s Words on Health Care", Huffington Post (18 August 2013) http://www.huffingtonpost.com/amanda-moore/martin-luther-king-health-care_b_2506393.html
1960s

Considerés que c'est de pueple, quant il s'esmuet et esliève et il a puissance contre son seigneur, et par especial en Angleterre. Là n'y a-il nul remède, car c'est le plus périlleus poeuple commun qui soit au monde et le plus oultrageux et orgueilleux. Et de tous ceulx d'Angleterre Londriens sont chiefs.
Book 4, pp. 454-5.
Chroniques (1369–1400)

Variant: Asteros's Motto: "Most experience comes from bad judgement.
Source: Acheron

Commonly attributed to Spencer, information provided in The Quote Verifier: Who Said What, Where, and When (2006) by Ralph Keyes and The Survival of a Fitting Quotation. (2005) by Michael StGeorge http://anonpress.org/spencer/, indicates the attribution may have originated with the book [w:The_Big_Book_(Alcoholics_Anonymous)|Alcoholics Anonymous]]. It was used exactly as written above in the personal stories section of the first edition in 1939 and in 'Appendix II: Spiritual Experience' of all subsequent editions.
: "Contempt prior to examination" was a phrase used by William Paley, the 18th-century English Christian apologist. In A View of the Evidences of Christianity (1794), he wrote:
::The infidelity of the Gentile world, and that more especially of men of rank and learning in it, is resolved into a principle which, in my judgment, will account for the inefficacy of any argument, or any evidence whatever, viz. contempt prior to examination.
:Paley's characterization of non-believers was later modified and used by other religious authors who uniformly attributed their words to Paley. In Anglo-Israel or, The British Nation: The lost Tribes of Israel (1879), Rev. William H. Poole may have been the first to render the quotation in its more familiar and enduring form:
::There is a principle which is a bar against all information, which is proof against all argument, and which cannot fail to keep a man in everlasting ignorance. This principle is, contempt prior to examination.
:Various authors following Rev. Poole would offer new iterations of the quotation into the early decades of the 20th century. Most of these credited William Paley, but by the early 1930s the first obscure publications to falsely attribute this quote to Spencer emerged. Its usage for decades since as a maxim in Alcoholics Anonymous and the twelve-step recovery community has popularized its erroneous association with Herbert Spencer.
Misattributed

Wilson Lewis, Epilogue, p. 262-263
Variant: But most of all, I learned that it’s possible for two people to fall in love all over again, even when there’s been a lifetime of disappointment between them.
Source: 2000s, The Wedding (2003)
Context: The events of the past year have taught me much about myself, and a few universal truths. I learned, for instance, that while wounds can be inflicted easily upon those we love, it's often much more difficult to heal them. Yet the process of healing those wounds provided the richest experience of my life, leading me to believe that while I've often overestimated what I could accomplish in a day, I had underestimated what I could do in a year. But most of all, I learned that it's possible for two people to fall in love all over again, even when there's been a lifetime of disappointment between them.

Source: Another World Is Possible : Globalization and Anti-capitalism (2002), Chapter 2, Globalization - It's Not About Free Trade, p. 30