When a legislature undertakes to proscribe the exercise of a citizen's constitutional right to free speech, it acts lawlessly; and the citizen can take matters into his own hands and proceed on the basis that such a law is no law at all.

Trees have judicial standing, and probably grass too.

Security can only be achieved through constant change, through discarding old ideas that have outlived their usefulness and adapting others to current facts.

Man is about to be an automaton; he is identifiable only in the computer. As a person of worth and creativity, as a being with an infinite potential, he retreats and battles the forces that make him inhuman. The dissent we witness is a reaffirmation of faith in man; it is protest against living under rules and prejudices and attitudes that produce the extremes of wealth and poverty and that make us dedicated to the destruction of people through arms, bombs, and gases, and that prepare us to think alike and be submissive objects for the regime of the computer.

Ideas are indeed the most dangerous weapons in the world. Our ideas of freedom are the most powerful political weapons man has ever forged.

The concept of the public welfare is broad and inclusive ... the values it represents are spiritual as well as physical, aesthetic as well as monetary. It is within the power of the legislature to determine that the community should be beautiful as well as healthy, spacious as well as clean, well balanced as well as carefully patroled.

No patent medicine was ever put to wider and more varied use than the Fourteenth Amendment.