"The course of decision in this Court has thus far jealously enforced the principle of a free society secured by the prohibition of unreasonable searches and seizures. Its safeguards are not to be worn away by a process of devitalizing interpretation."

“In this Court dissents have gradually become majority opinions.”

“Congress is, after all, not a body of laymen unfamiliar with the commonplaces of our law. This legislation was the formulation of the two Judiciary Committees, all of whom are lawyers, and the Congress is predominately a lawyers' body.”

“A court which yields to the popular will thereby licenses itself to practice despotism, for there can be no assurance that it will not on another occasion indulge its own will.”

“A phrase begins life as a literary expression; its felicity leads to its lazy repetition; and repetition soon establishes it as a legal formula, undiscriminatingly used to express different and sometimes contradictory ideas.”

“To be effective, judicial administration must not be leaden-footed.”

“Of compelling consideration is the fact that words acquire scope and function from the history of events which they summarize.”