“You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.”

As quoted by US President John F. Kennedy in a speech. (29 June 1962)

Speech in Burma (July 1944) as quoted in The Great Speeches of Modern India (2011) by Rudrangshu Mukherjee

Kunnumpuram, Kurien, 2011 “Theological Exploration,” Jnanadeepa: Pune Journal of Religious Studies 14/2 (July-Dec 2011)
On God

Source: Autobiography of a Spiritually Incorrect Mystic (2000), p. 25

A falsified quote invented during the 2010 financial crisis. http://www.perseus.tufts.edu/hopper/text?doc=Isoc.+7+20&fromdoc=Perseus%3Atext%3A1999.01.0144 Isocrates' actual, more nuanced, quote runs as follows:
Those who directed the state in the time of Solon and Cleisthenes did not establish a polity which … trained the citizens in such fashion that they looked upon insolence as democracy, lawlessness as liberty, impudence of speech as equality, and licence to do what they pleased as happiness, but rather a polity which detested and punished such men and by so doing made all the citizens better and wiser.
Areopagiticus, 7.20 (Norlin)
Misattributed

The Ballot or the Bullet (1964), Speech in Cleveland, Ohio (April 3, 1964)

Hocus Pocus (1990)

On Freedom (1958)
Context: Although I consider our political world to be the best of which we have any historical knowledge, we should beware of attributing this fact to democracy or to freedom. Freedom is not a supplier who delivers goods to our door. Democracy does not ensure that anything is accomplished — certainly not an economic miracle. It is wrong and dangerous to extol freedom by telling people that they will certainly be all right once they are free. How someone fares in life is largely a matter of luck or grace, and to a comparatively small degree perhaps also of competence, diligence, and other virtues. The most we can say of democracy or freedom is that they give our personal abilities a little more influence on our well-being.

As quoted in NEA Journal : The Journal of the National Education Association‎ Vol. 41 (1952) p. 300
Context: One of the basic causes for all the trouble in the world today is that people talk too much and think too little. They act too impulsively without thinking. I am not advocating in the slightest that we become mutes with our voices stilled because of fear of criticism of what we might say. That is moral cowardice. And moral cowardice that keeps us from speaking our minds is as dangerous to this country as irresponsible talk. The right way is not always the popular and easy way. Standing for right when it is unpopular is a true test of moral character. The importance of individual thinking to the preservation of our democracy and our freedom cannot be overemphasized. The broader sense of the concept of your role in the defense of democracy is that of the citizen doing his most for the preservation of democracy and peace by independent thinking, making that thinking articulate by translating it into action at the ballot boxes, in the forums, and in everyday life, and being constructive and positive in that thinking and articulation. The most precious thing that democracy gives to us is freedom. You and I cannot escape the fact that the ultimate responsibility for freedom is personal. Our freedoms today are not so much in danger because people are consciously trying to take them away from us as they are in danger because we forget to use them. Freedom unexercised may be freedom forfeited. The preservation of freedom is in the hands of the people themselves — not of the government.