“A function of free speech under our system of government is to invite dispute. It may indeed best serve its high purposes when it induces a condition of unrest, creates dissatisfaction with conditions as they are, or even stirs people to anger. Speech is often provocative and challenging. It may strike at prejudices and preconceptions and have profound unsettling effects as it presses for acceptance of an idea.”

Concurring in New York Times Co. v. United States, 403 U.S. 713 (1971).

Source: [The Review of Metaphysics, 1, 4, June 1948, 32–58, Pragmatism and Existence, https://www.pdcnet.org/revmetaph/content/revmetaph_1948_0001_0004_0032_0058]

Charles Evans Hughes, De Jonge v. Oregon, 299 U.S. 353, 365 (1937).
Judicial opinions
Context: Freedom of speech and of the press are fundamental rights which are safeguarded by the due process clause of the Fourteenth Amendment of the Federal Constitution. [... ] The right of peaceable assembly is a right cognate to those of free speech and free press, and is equally fundamental. As this Court said in United States v. Cruikshank, 92 U. S. 542, 552: The very idea of a government, republican in form, implies a right on the part of its citizens to meet peaceably for consultation in respect to public affairs and to petition for a redress of grievances. The First Amendment of the Federal Constitution expressly guarantees that right against abridgment by Congress. But explicit mention there does not argue exclusion elsewhere. For the right is one that cannot be denied without violating those fundamental principles of liberty and justice which lie at the base of all civil and political institutions — principles which the Fourteenth Amendment embodies in the general terms of its due process clause. [... ] These rights may be abused by using speech or press or assembly in order to incite to violence and crime. The people, through their legislatures may protect themselves against that abuse. But the legislative intervention, can find constitutional justification only by dealing with the abuse. The rights themselves must not be curtailed. The greater the importance of safeguarding the community from incitements to the overthrow of our institutions by force and violence, the more imperative is the need to preserve inviolate the constitutional rights of free speech, free press and free assembly in order to maintain the opportunity for free political discussion, to the end that government may be responsive to the will of the people and that changes, if desired, may be obtained by peaceful means. Therein lies the security of the Republic, the very foundation of constitutional government.

McIntyre v. Ohio Elections Commission (Majority opinion, 514 U.S. 334 (1995)

Source: The House Of Commons At Work (1993), Chapter 9, The House of Commons Functions, p. 122

1970s, State of the Union Address (1975)
Context: Government exists to create and preserve conditions in which people can translate their ideas into practical reality. In the best of times, much is lost in translation. But we try. Sometimes we have tried and failed. Always we have had the best of intentions.
But in the recent past, we sometimes forgot the sound principles that guided us through most of our history. We wanted to accomplish great things and solve age-old problems. And we became overconfident of our abilities. We tried to be a policeman abroad and the indulgent parent here at home.
We thought we could transform the country through massive national programs, but often the programs did not work. Too often they only made things worse. In our rush to accomplish great deeds quickly, we trampled on sound principles of restraint and endangered the rights of individuals. We unbalanced our economic system by the huge and unprecedented growth of Federal expenditures and borrowing. And we were not totally honest with ourselves about how much these programs would cost and how we would pay for them.

Finding Our Way: Leadership For an Uncertain Time (2005)

1960s, The American Promise (1965)
Context: We must preserve the right of free speech and the right of free assembly. But the right of free speech does not carry with it, as has been said, the right to holler fire in a crowded theater. We must preserve the right to free assembly, but free assembly does not carry with it the right to block public thoroughfares to traffic. We do have a right to protest, and a right to march under conditions that do not infringe the constitutional rights of our neighbors. And I intend to protect all those rights as long as I am permitted to serve in this office. We will guard against violence, knowing it strikes from our hands the very weapons which we seek — progress, obedience to law, and belief in American values.

Source: Democracy: The God That Failed (2001), P. 218.