The meaning of the First Amendment has been, and will be, shaped by each American generation: by judges, political leaders, citizens. There will always be authorities who try to make their own lives more comfortable by suppressing critical comment.… But I am convinced that the fundamental American commitment to free speech, disturbing speech, is no longer in doubt.

Lewis, Anthony (2007). Freedom for the Thought That We Hate; A Biography of the First Amendment. Basic Books. p. xv. ISBN 0465039170.