John Marshall Harlan II quotes:

Privacy in one's associations... may in many circumstances be indispensable to freedom of association, particularly where a group espouses dissident beliefs.

One man's vulgarity is another man's lyric.

We cannot sanction the view that the Constitution, while solicitous of the cognitive content of individual speech, has little or no regard for that emotive function which, practically speaking, may often be the more important element of the overall message sought to be communicated.

The dissemination of the individual's opinions on matters of public interest is for us, in the historic words of the Declaration of Independence, an 'unalienable right' that 'governments are instituted among men to secure.' History shows us that the Founders were not always convinced that unlimited discussion of public issues would be 'for the benefit of all of us' but that they firmly adhered to the proposition that the 'true liberty of the press' permitted 'every man to publish his opinion'.

The constitutional right of free expression... is designed and intended to remove governmental restraints from the arena of public discussion, putting the decision as to what views shall be voiced in the hands of each of us, in the hope that the use of such freedom will ultimately produce a more capable citizenry and more perfect polity and in the belief that no other approach would comport with the premise of individual dignity and choice upon which our political systems rests.