West Virginia State Board of Education v. Barnette (1943)

Justice Jackson's majority opinion:
If there is any fixed star in our constitutional constellation, it is that no official, high or petty, can prescribe what shall be orthodox in politics, nationalism, religion, or other matters of opinion or force citizens to confess by word or act their faith therein. If there are any circumstances which permit an exception, they do not now occur to us.

Justice Frankfurter's dissenting opinion:
One who belongs to the most vilified and persecuted minority in history is not likely to be insensible to the freedoms guaranteed by our Constitution. Were my purely personal attitude relevant, I should wholeheartedly associate myself with the general libertarian views in the Court's opinion, representing, as they do, the thought and action of a lifetime. But, as judges, we are neither Jew nor Gentile, neither Catholic nor agnostic. We owe equal attachment to the Constitution, and are equally bound by our judicial obligations whether we derive our citizenship from the earliest or the latest immigrants to these shores. As a member of this Court, I am not justified in writing my private notions of policy into the Constitution, no matter how deeply I may cherish them or how mischievous I may deem their disregard.

Wooley v. Maynard (1977)

Chief Justice Burger's majority opinion:
Here, as in Barnette, we are faced with a state measure which forces an individual, as part of his daily life—indeed constantly while his automobile is in public view—to be an instrument for fostering public adherence to an ideological point of view he finds unacceptable. 

Hurley v. Irish-American Gay, Lesbian and Bisexual Group of Boston (1995)

The protected expression that inheres in a parade is not limited to its banners and songs, however, for the Constitution looks beyond written or spoken words as mediums of expression. Noting that "[s]ymbolism is a primitive but effective way of communicating ideas," West Virginia Bd. of Ed. v. Barnette, 319 U. S. 624, 632 (1943), our cases have recognized that the First Amendment shields such acts as saluting a flag (and refusing to do so), wearing an armband to protest a war, displaying a red flag, and even "[m]arching, walking or parading" in uniforms displaying the swastika. As some of these examples show, a narrow, succinctly articulable message is not a condition of constitutional protection, which if confined to expressions conveying a "particularized message," would never reach the unquestionably shielded painting of Jackson Pollock, music of Arnold Schoenberg, or Jabberwocky verse of Lewis Carroll. Not many marches, then, are beyond the realm of expressive parades, and the South Boston celebration is not one of them.

"Since all speech inherently involves choices of what to say and what to leave unsaid," one important manifestation of the principle of free speech is that one who chooses to speak may also decide "what not to say" . . . . Petitioners' claim to the benefit of this principle of autonomy to control one's own speech is as sound as the South Boston parade is expressive. Rather like a composer, the Council selects the expressive units of the parade from potential participants, and though the score may not produce a particularized message, each contingent's expression in the Council's eyes comports with what merits celebration on that day. Even if this view gives the Council credit for a more considered judgment than it actively made, the Council clearly decided to exclude a message it did not like from the communication it chose to make, and that is enough to invoke its right as a private speaker to shape its expression by speaking on one subject while remaining silent on another. The message it disfavored is not difficult to identify. Although GLIB's point (like the Council's) is not wholly articulate, a contingent marching behind the organization's banner would at least bear witness to the fact that some Irish are gay, lesbian, or bisexual, and the presence of the organized marchers would suggest their view that people of their sexual orientations have as much claim to unqualified social acceptance as heterosexuals and indeed as members of parade units organized around other identifying characteristics. The parade's organizers may not believe these facts about Irish sexuality to be so, or they may object to unqualified social acceptance of gays and lesbians or have some other reason for wishing to keep GLIB's message out of the parade. But whatever the reason, it boils down to the choice of a speaker not to propound a particular point of view, and that choice is presumed to lie beyond the government's power to control.

Rumsfeld v. Forum for Academic and Institutional Rights, Inc (FAIR) (2006)

A law school’s recruiting services lack the expressive quality of a parade, a newsletter, or the editorial page of a newspaper; its accommodation of a military recruiter’s message is not compelled speech because the accommodation does not sufficiently interfere with any message of the school.

Janus v. American Federation of State, County and Municipal Employees, Council 31

When speech is compelled, however, additional damage is done. In that situation, individuals are coerced into betraying their convictions. Forcing free and independent individuals to endorse ideas they find objectionable is always demeaning, and for this reason, one of our landmark free speech cases said that a law commanding “involuntary affirmation” of objected-to beliefs would require “even more immediate and urgent grounds” than a law demanding silence. Barnette, supra, at 633, 63 S.Ct. 1178.

Compelling a person to subsidize the speech of other private speakers raises similar First Amendment concerns. As Jefferson famously put it, “to compel a man to furnish contributions of money for the propagation of opinions which he disbelieves and abhor[s] is sinful and tyrannical.” A Bill for Establishing Religious Freedom, in 2 Papers of Thomas Jefferson 545 (J. Boyd ed. 1950). We have therefore recognized that a “ ‘significant impingement on First Amendment rights' ” occurs when public employees are required to provide financial support for a union that “takes many positions during collective bargaining that have powerful political and civic consequences.”