Potter Stewart served as Associate Justice of the U.S. Supreme Court for nearly 23 years (1958-1981) and participated in a number of landmark decisions, including Jones v. Alfred H. Mayer Co. (1968) and Roe v. Wade (1973). Yet, for his legacy, he is remembered primarily because of a truncated fragment of his concurrence to the opinion in the obscenity case of Jacobellis v. Ohio (1964).
Stewart wrote that “hard-core pornography” is hard to define, but “I know it when I see it.” That simple statement is probably the most famous quote from the annals of the Supreme Court.
On a similar note, Stewart’s less-familiar dissent in Ginsburg v. United States (1966) is perhaps more lucid than the statement he’d made on obscenity two years earlier. In Ginsburg he wrote “Censorship reflects society's lack of confidence in itself. It is a hallmark of an authoritarian regime.”