“Liberty is the prevention of control by others. This requires self-control and, therefore, religious and spiritual influences; education, knowledge, well-being.”
As quoted in Faith in Freedom : Libertarian Principles and Psychiatric Practices (2004) by Thomas Stephen Szasz, p. 10. Selected Writings of Lord Acton, ed. J. Rufus Fears, 3 vols. (Indianapolis: Liberty Fund, 1985-88), 3:490
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John Dalberg-Acton, 1st Baron Acton 112
British politician and historian 1834–1902Related quotes

Source: Discovery of Freedom: Man's Struggle Against Authority (1943), p. xii.

“Self-reverence, self-knowledge, self-control,
These three alone lead life to sovereign power.”
"Oenone", st. 14
Context: Self-reverence, self-knowledge, self-control,
These three alone lead life to sovereign power.
Yet not for power (power of herself
Would come uncall'd for) but to live by law,
Acting the law we live by without fear;
And, because right is right, to follow right
Were wisdom in the scorn of consequence.
Weapons of Mass Instruction: A Schoolteacher's Journey Through the Dark World of Compulsory Schooling (2008)
Source: Weapons of Mass Instruction: A Schoolteacher's Journey Through the Dark World of Compulsory Schooling, New Society Publishers (2013) p. 177
Source: Sociology and modern systems theory (1967), P. 186.

Iowa straw poll speech, August 14, 1999. http://renewamerica.us/archives/speeches/99_08_14strawpoll.htm.
1999