I shall not today attempt further to define the kinds of material but I know it when I see it.
Potter StewartEthics is knowing the difference between what you have a right to do and what is right to do.
Potter StewartThe equal protection standard of the constitution has one clear and central meaning - it absolutely prohibits invidious [repugnant] discrimination by government...Under our Constitution, any official action that treats a person differently on account of his race or ethnic origin is inherently [by nature] suspect and presumptively [probably] invalid...Under the Constitution we have, one practice in which government may never engage in the practice of racism - not even "temporarily" and not even as an "experiment."
Potter StewartFor the Fourth Amendment protects people, not places. What a person knowingly exposes to the public, even in his own home or office, is not a subject of Fourth Amendment protection. But what he seeks to preserve as private, even in an area accessible to the public, may be constitutionally protected.
Potter Stewart