If we don't believe in freedom of expression for people we despise, we don't believe in it at all.
If liberty means anything at all, it means the right to tell people what they do not want to hear.
Liberalism is the right to question without being called a heretic. That's what America did for the world.
The true test of one's commitment to liberty and private property rights doesn't come when we permit people to be free to do those voluntary things with which we agree. The true test comes when we permit people to be free to do those voluntary things with which we disagree.
Pluralism of opinions is not dissent but democratic centralism understood in a new way.
Democracy is no easy form of government. Few nations have been able to sustain it. For it requires that we take the chances of freedom; that the liberating play of reason be brought to bear on events filled with passion; that dissent be allowed to make its appeal for acceptance; that men chance error in their search for the truth.
Democracy acknowledges the right to differ as well as the duty to settle differences peacefully. Authoritarian governments see criticism of their actions and doctrines as a challenge to combat.
To view the opposition as dangerous is to misunderstand the basic concepts of democracy. To oppress the opposition is to assault the very foundation of democracy.
Where there is a great deal of free speech there is always a certain amount of foolish speech.
If there be any among us who would wish to dissolve this Union or to change its republican form, let them stand undisturbed as monuments of the safety with which error of opinion may be tolerated where reason is left free to combat it.