“The secret of happiness is freedom and the secret of freedom is courage.”
Book II, 2.43
History of the Peloponnesian War, Book II
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Thucydides 76
Greek historian and Athenian generalRelated quotes

“This planet’s secret menace was—freedom!”
Shape (p. 44)
Short fiction, Untouched by Human Hands (1954)

Original French: Le secret de la liberté est d'éclairer les hommes, comme celui de la tyrannie est de les retenir dans l'ignorance
Source: Oeuvres, Volume 2 http://books.google.com/books?id=iSMVAAAAQAAJ p. 253.

Source: Call of Duty: My Life Before, During and After the Band of Brothers (2008), p. 107

“The secret of a happy marriage remains a secret.”
"Forbes" - Vol. 166, Page 156, de Bertie Charles Forbes - Forbes Inc., 2000

“To whom thy secret thou dost tell, to him thy freedom thou dost sell.”
Lexicon Tetraglotton (1660)

Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni

2000s, 2004, Speech to United Nations General Assembly (September 2004)