“If men insisted on being free from the burden of a life that was self-dependent and also responsible for the common good, they would cease to be free at all. Responsibility was the price every man must pay for freedom. It was to be had on no other terms.”

This quotation appeared in an article by Margaret Thatcher, "The Moral Foundations of Society" ( Imprimis, March 1995 https://imprimis.hillsdale.edu/the-moral-foundations-of-society/), which was an edited version of a lecture Thatcher had given at Hillsdale College in November 1994. Here is the actual passage from Thatcher's article:
<blockquote>[M]ore than they wanted freedom, the Athenians wanted security. Yet they lost everything—security, comfort, and freedom. This was because they wanted not to give to society, but for society to give to them. The freedom they were seeking was freedom from responsibility. It is no wonder, then, that they ceased to be free. In the modern world, we should recall the Athenians' dire fate whenever we confront demands for increased state paternalism.</blockquote>
The italicized passage above originated with Thatcher. In characterizing the Athenians in the article she cited Sir Edward Gibbon, but she seems to have been paraphrasing statements in "Athens' Failure," a chapter of classicist Edith Hamilton's book The Echo of Greece (1957), pp. 47–48 http://www.ergo-sum.net/books/Hamilton_EchoOfGreece_pp.47-48.jpg).
Misattributed

Source: Anthem (1937)

Source: Jesus Before Christianity: The Gospel of Liberation (1976), p. 71.
Context: The leaders and scholars of Jesus’ time had first enslaved themselves to the law. This not only enhanced their prestige in society, it also gave them a sense of security. Man fears the responsibility of being free. It is often easier to let others make the decisions or to rely upon the letter of the law. Some men want to be slaves. After enslaving themselves to the letter of the law, such men always go on to deny freedom to others. They will not rest until they have imposed the same oppressive burdens upon everyone (Matt 23:4,15).

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

Source: Letters and Papers from Prison (1967; 1997), Civil Courage, p. 5.
Context: What lies behind the complaint about the dearth of civil courage? In recent years we have seen a great deal of bravery and self-sacrifice, but civil courage hardly anywhere, even among ourselves. To attribute this simply to personal cowardice would be too facile a psychology; its background is quite different. In a long history, we Germans have had to learn the need for and the strength of obedience. In the subordination of all personal wishes and ideas to the tasks to which we have been called, we have seen the meaning and greatness of our lives. We have looked upwards, not in servile fear, but in free trust, seeing in our tasks a call, and in our call a vocation. This readiness to follow a command from "above" rather than our own private opinions and wishes was a sign of legitimate self-distrust. Who would deny that in obedience, in their task and calling, the Germans have again and again shown the utmost bravery and self-sacrifice? But the German has kept his freedom — and what nation has talked more passionately of freedom than the Germans, from Luther to the idealist philosophers? — by seeking deliverance from self-will through service to the community. Calling and freedom were to him two sides of the same thing. But in this he misjudged the world; he did not realize that his submissiveness and self-sacrifice could be exploited for evil ends. When that happened, the exercise of the calling itself became questionable, and all the moral principles of the German were bound to totter. The fact could not be escaped that the Germans still lacked something fundamental: he could not see the need for free and responsible action, even in opposition to the task and his calling; in its place there appeared on the one hand an irresponsible lack of scruple, and on the other a self-tormenting punctiliousness that never led to action. Civil courage, in fact, can grow only out of the free responsibility of free men. Only now are the Germans beginning to discover the meaning of free responsibility. It depends on a God who demands responsible action in a bold venture of faith, and who promises forgiveness and consolation to the man who becomes a sinner in that venture.

Address accepting the Presidency of the Congress of Industrial Organizations, Atlantic City, New Jersey, December 4, 1952, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 51
1940s, Address accepting the Presidency of the CIO (1952)
I've often thought: Why is it that you can get a great nation like America marching, fighting, sacrificing, and dying in the struggle to destroy the master race theory in Berlin, and people haven't got an ounce of courage to fight against the master race theory in America? We need the same sense of dedication, the same courage, and the same determination to fight the immorality of segregation and racial bigotry in America as we did in the battlefields against Hitlersim.

Credo (1965)

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