The right to defy an unconstitutional statute is basic in our scheme. Even when an ordinance requires a permit to make a speech, to deliver a sermon, to picket, to parade, or to assemble, it need not be honored when it's invalid on its face.
Potter StewartEthics is knowing the difference between what you have a right to do and what is right to do.
Potter StewartThe First Amendment guarantees liberty of human expression in order to preserve in our Nation what Mr. Justice Holmes called a "free trade in ideas." To that end, the Constitution protects more than just a man's freedom to say or write or publish what he wants. It secures as well the liberty of each man to decide for himself what he will read and to what he will listen. The Constitution guarantees, in short, a society of free choice.
Potter Stewart