“The slaves of power mind the cause they have to serve, because their own interest is concerned; but the friends of liberty always sacrifice their cause, which is only the cause of humanity, to their own spleen, vanity, and self-opinion.”
Review of Lord Byron's Childe Harold in Yellow Dwarf (2 May 1818), reprinted in The Collected Works of William Hazlitt, ed. A.R. Waller and Arnold Glover (1902-1904)
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William Hazlitt 186
English writer 1778–1830Related quotes

Source: Letter to Roger Tayeb, December 1961, as cited in Peter Geismar, Fanon (1971), p. 185.

June 10, 1850 in a speech before Congress on the Fugitive Slave Act. Page 123, Vol. 1, Palmer http://web.archive.org/web/20131209113445/http://thaddeusstevenssociety.com/Quotes.html. In Selected Papers of Thaddeus Stevens
1850s

Source: Towards Evening (1889), p. 51

Source: Thoughts Selected from the Writings of Horace Mann (1872), p. 7

Memoirs (trans. Machen 1894), book 1, Preface http://etext.library.adelaide.edu.au/c/casanova/c33m/preface2.html
Referenced
Source: Geschichte Meines Lebens

“Remember always that the cause of the United States is the cause of human nature.”
Letter to Charles F. Adams (1863), as quoted in Papers Relating to the Foreign Relations of the United States, Volume 2 https://books.google.com/books?id=xe9TAAAAcAAJ&pg=PA150&lpg=PA150&dq=%22the+cause+of+the+United+States+is+the+cause+of+human%22&source=bl&ots=WHM-9fK5zZ&sig=3aspBI67n5cNTU2ARF6OaNTyCDQ&hl=en&sa=X&ved=0CB4Q6AEwAGoVChMIt7WJl9msxwIViDI-Ch3mpgBq#v=onepage&q=%22the%20cause%20of%20the%20United%20States%20is%20the%20cause%20of%20human%22&f=false, p. 150.

Thatcher, Margaret (2002). Statecraft: Strategies for a Changing World. New York: HarperCollins. ISBN 0-06-095912-6.