The Owner Built Home: A How-to-do-it Book (1972)
Quotes about gain
page 7

Quote, 1914, in 'Functions of Painting by Fernand Leger; p. 11
Quotes of Fernand Leger, 1910's, Contemporary Achievements in Painting, 1914
Source: Star Maker (1937), Chapter III: The Other Earth; 1. On the Other Earth (p. 26)
Source: The End of the American Era (2002), Chapter three: "The False Promise of Globalization and Democracy"

KGNU benefit at the University of Colorado at Boulder, April 5, 2003 http://www.freespeech.org/fscm2/contentviewer.php?content_id=418
Quotes 2000s, 2003

“Always gain fresh insights, don't hesitate to ask the right questions.”
How I made it: CNR Rao, Scientist (2010)

1961, Address at the University of Washington
Anything close should not cause you a win.
2012-02-05
An Exclusive Interview With the Ms. Olympia Champion Iris Kyle
RX Muscle
Internet
http://www.rxmuscle.com/rx-girl-articles/female-bodybuilding/4986-an-exclusive-interview-with-the-ms-olympia-champion-iris-kyle.html
Sourced quotes, 2012

Source: Responsibility and Response (1967), p. 79
Sultãn Alãu’d-Dîn Mujãhid Shãh Bahmanî (AD 1375-1378) Vijayanagar (Karnataka)
Tãrîkh-i-Firishta

Brown : The Last Discovery of America (2003)
Source: Isle of the Dead (1969), Chapter 2 (p. 45)

Instead we shall speak of the normative function of the thinking process, which can guide the pictorial elements of thinking into any logically permissible structure.
The Philosophy of Space and Time (1928, tr. 1957)
Source: Matter and Consciousness, 1984/1988/2013, p. 96; As cited in: Peter Zachar (2000) Psychological Concepts and Biological Psychiatry. p. 132

“Counts his sure gains, and hurries back for more.”
The West Indies, Part iii.
Bartlett's Familiar Quotations, 10th ed. (1919).
Source: The Nude: A Study in Ideal Form (1951), Ch. I: The Naked and the Nude

Speech in Woodford (12 October 1951), quoted in The Times (13 October 1951), p. 9
Post-war years (1945–1955)

The Law of Mind (1892)

1920s, Duty of Government (1920)

The Art of Piano Playing (1958), Ch. 1. The Artistic Image of a Musical Composition
Source: The Balanced Scorecard, 1996, p. 2-3

The Law of Mind (1892)

“He had gained all the power he had dreamed of then—and had not known a moment of peace since.”
Source: She Is the Darkness (1997), Chapter 5 (p. 288)

Speech at Harvard University (20 October 2004)
Source: 1960s, Prisoner's dilemma: A study in conflict and cooperation (1965), p. 185
New York State Journal of Medicine, review of Understanding the Alcoholic's Mind.
Source: The Night Land (1912), Chapter 15

“Our Optimism and Faith” http://www.marxists.org/archive/tito/1945/02/04.htm Liberation magazine, page 3 (United Committee of South- Slavonic Americans, 1945)
Writings

Source: Dr. Heidenhoff's Process http://www.gutenberg.org/files/7052/7052-h/7052-h.htm (1880), Ch. 3.
Source: The Passionate Life (1983), p. 137

Wired message to General Admiral Karl Dönitz, April 28, 1945.

"The Son of God Goes Forth to War", st. 1 (1812).
Hymns

Source: Writings, Politics of Guilt and Pity (1978), p. 19

Quoted in "Mr. Darman's Sermon", July 29, 1989, editorial, New York Times.

as quoted in Kissinger: The Secret Side of the Secretary of State (1976) by Gary Allen

In his travelogue Apoorvai (अपूर्वाइ), Pu La describes the non-stop flow of advice before traveling to London. This quote is one advice given to him on learning on how many pounds porters charge for carrying baggage on train stations in London.
From his various literature

Source: The Dark Is Rising (1965-1977), The Dark Is Rising (1973), Chapter 7 “Betrayal” (p. 107)

XVII, 15
The Kitáb-I-Asmá

Source: Attributed from posthumous publications, Dialogues of Alfred North Whitehead (1954), p. 66

Source: Pali Canon, Sutta Pitaka, Khuddaka Nikaya (Minor Collection), (Suttas falling down), Sutta 3.2. Padhana Sutta

“Before this time to-morrow I shall have gained a peerage, or Westminster Abbey.”
Before the Battle of the Nile (1 August 1797), as quoted in Life of Nelson, Ch. 5; alternately reported as "Westminster Abbey, or victory!"
1790s

'Britain and Europe: The problem with being half pregnant', in Keith Sutherland (ed.), The Rape of the Constitution? (Imprint Academic, 2000), p. 277
2000s

Gameplay magazine

Source: De Moneta (c. 1360), Ch. 15: That the Profit accruing to the Prince from Alteration of the Coinage is unjust

“The dog, to gain some private ends,
Went mad, and bit the man.”
Source: The Vicar of Wakefield (1766), Ch. 17, An Elegy on the Death of a Mad Dog, st. 5.

Harold Demsetz, (1967). "Toward a Theory of Property Rights." American Economic Review 57 (May, No. 2): 347-359. p. 350, as cited in Eggertsson (1990; 250)

1870s, Fourth State of the Union Address (1872)

The Common School Journal, Vol. V, No. 19 (2 October 1843)

1920s, Toleration and Liberalism (1925)
Source: How to Stop Worrying and Start Living (1948), p. 14
Source: Group Theory in the Bedroom (2008), Chapter 5, Statistics Of Deadly Quarrels, p. 89

Life Without and Life Within (1859), Freedom and Truth

"Catholics", published in The Edinburgh Review (1827)

1950s, Conquering Self-centeredness (1957)

Speech August 1, 1978 http://www.larouchepub.com/eiw/public/1978/eirv05n35-19780912/eirv05n35-19780912_061-who_are_afghanistans_new_leaders.pdf.

VIII. Art and Artists
1910 - 1915, Concerning the Spiritual in Art, 1911
General System Theory (1968), 4. Advances in General Systems Theory
A Short History of the World (2000)

Introduction to Maugham's Malaysian Stories (1969)
People, Joseph Conrad, W. Somerset Maugham

Source: The Rise of China and the Demise of the Capitalist World-Economy (2008), Chapter Two, "Accumulation, Basic Needs, and Class Struggle: the Rise of Modern China"

Introduction to Public Policy (2011), Ch. 5 : Evaluating Social Welfare

Source: 1840s, Three Discourses on Imagined Occasions (1845), p. 48

The Decade Of Publicy http://www.stoweboyd.com/message/2010/1/2/the-decade-of-publicy.html, January 2, 2010.

“It was men’s ambitions, they said, that had perverted all the arts to ends of gain.”
“The Finder” (p. 56)
Earthsea Books, Tales from Earthsea (2001)

Falling (l. 66–68).
The Whole Motion; Collected Poems, 1945-1992 (1992)

Gary North Political Polytheism (1989).

"Designing Literature: Creative Collaboration" http://www.danagioia.net/essays/ecreative.htm (1992)
Essays

1950s, Conquering Self-centeredness (1957)

if not by myself, then by someone else. The show shouldn't end with my death, which becomes a minor boo-hoo.
p. 211 (1959)
Commonplace Book (1985)

“Knowledge once gained casts a faint light beyond its own immediate boundaries.”
On the Methods and Tendencies of Physical Investigation, p. 7.
Scientific addresses (1870)

Source: 1975, The Philosophy of Andy Warhol (1975), Ch. 6: Work

Address at a Swedish Colonial Society luncheon in Philadelphia (9 April 2001).
Books, articles, and speeches

Falsehood in Wartime (1928), Introduction

Letter that he wrote to his older brother Seshama Raju (1947) [Better dating and sourcing of any publication would be useful here]

“Learning hath gained most by those books by which the printers have lost.”
Of Books.
The Holy State and the Profane State (1642)

On the Correct Handling of Contradictions Among the People
Original: (zh-CN) 在我们的许多工作人员中间,现在滋长着一种不愿意和群众同甘苦,喜欢计较个人名利的危险倾向,这是很不好的。我们在增产节约运动中要求精简机关,下放干部,使相当大的一批干部回到生产中去,就是克服这种危险倾向的一个方法。要使全体干部和全体人民经常想到我国是一个社会主义的大国,但又是一个经济落后的穷国,这是一个很大的矛盾。要使我国富强起来,需要几十年艰苦奋斗的时间,其中包括执行厉行节约、反对浪费这样一个勤俭建国的方针。

Misattributed
Source: Margaret Mead, quoted in "Growing Old in America: An Introduction with Margaret Mead" by Grace Hechinger, Family Circle (1977-07-26), p. 27.
"Dissenting Rivals: Urquhart and Cobden", p. 55
The Trouble Makers: Dissent over Foreign Policy, 1792-1939 (1957)

Grenzfurther, J. and Schneider, F.: 'Hacking the Spaces' http://www.monochrom.at/hacking-the-spaces/, 2009

Source: Poverty (1912), p. 2

Other writings, The Paradoxes of Legal Science (1928)