"Struggles to coerce uniformity of sentiment in support of some end thought essential to their time and country have been waged by many good, as well as by evil, men. Nationalism is a relatively recent phenomenon, but, at other times and places, the ends have been racial or territorial security, support of a dynasty or regime, and particular plans for saving souls. As first and moderate methods to attain unity have failed, those bent on its accomplishment must resort to an ever-increasing severity. As governmental pressure toward unity becomes greater, so strife becomes more bitter as to whose unity it shall be."

"The very purpose of a Bill of Rights was to withdraw certain subjects from the vicissitudes of political controversy, to place them beyond the reach of majorities and officials, and to establish them as legal principles to be applied by the courts. One's right to life, liberty, and property, to free speech, a free press, freedom of worship and assembly, and other fundamental rights may not be submitted to vote; they depend on the outcome of no elections."

"Government of limited power need not be anemic government. Assurance that rights are secure tends to diminish fear and jealousy of strong government, and by making us feel safe to live under it makes for its better support."

"Procedural fairness, if not all that originally was meant by due process of law, is at least what it most uncompromisingly requires. Procedural due process is more elemental and less flexible than substantive due process. It yields less to the times, varies less with conditions, and defers much less to legislative judgment. Insofar as it is technical law, it must be a specialized responsibility within the competence of the judiciary on which they do not bend before political branches of the Government, as they should on matters of policy which compromise substantive law. If it be conceded that in some way [that the agency could take the action it did], does it matter what the procedure is? Only the untaught layman or the charlatan lawyer can answer that procedure matters not. Procedural fairness and regularity are of the indispensable essence of liberty. Severe substantive laws can be endured if they are fairly and impartially applied. Indeed, if put to the choice, one might well prefer to live under Soviet substantive law applied in good faith by our common-law procedures than under our substantive law enforced by Soviet procedural practices. Let it not be overlooked that due process of law is not for the sole benefit of an accused. It is the best insurance for the Government itself against those blunders which leave lasting stains on a system of justice but which are bound to occur on ex parte consideration."

"The duty to disclose knowledge of crime rests upon all citizens."

"But the validity of a doctrine does not depend on whose ox it gores."

"I should concur in this result more readily if the Court could reach it by analysis of the statute instead of by psychoanalysis of Congress. When we decide from legislative history, including statements of witnesses at hearings, what Congress probably had in mind, we must put ourselves in the place of a majority of Congressmen and act according to the impression we think this history should have made on them. Never having been a Congressman, I am handicapped in that weird endeavor. That process seems to me not interpretation of a statute but creation of a statute."

"We granted certiorari, and in this Court the parties changed positions as nimbly as if dancing a quadrille."

"Reversal by a higher court is not proof that justice is thereby better done. There is no doubt that if there were a super-Supreme Court, a substantial proportion of our reversals of state courts would also be reversed. We are not final because we are infallible, but we are infallible only because we are final."