“The only respect in which man is superior to animals is that he can die when he wants to, not just when he has to. Maybe it's the one freedom you can always count on — the freedom to throw your life away.”

Speech to the American Legion convention, New York City (27 August 1952); as quoted in "Democratic Candidate Adlai Stevenson Defines the Nature of Patriotism" in Lend Me Your Ears : Great Speeches In History (2004) by William Safire, p. 81 - 82
Context: It was always accounted a virtue in a man to love his country. With us it is now something more than a virtue. It is a necessity. When an American says that he loves his country, he means not only that he loves the New England hills, the prairies glistening in the sun, the wide and rising plains, the great mountains, and the sea. He means that he loves an inner air, an inner light in which freedom lives and in which a man can draw the breath of self-respect.
Men who have offered their lives for their country know that patriotism is not the fear of something; it is the love of something.

As quoted in Letters of H. L. Mencken (1961) edited by Guy J. Forgue, p. xiii
1940s–present

Source: The Scripture of the Golden Eternity

Speech in New York City (7 January 1965)
Malcolm X Speaks (1965)
Variant: You can't separate peace from freedom, because no one can be at peace unless he has his freedom.

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

Source: For The Sake of Heaven (1945), p. 44

Some Men are More Perfect Than Others (1973)

F 49
Aphorisms (1765-1799), Notebook F (1776-1779)