Civil government cannot let any group ride roughshod over others simply because their consciences tell them to do so.

We are not final because we are infallible, but infallible only because we are final.

The common sense of mankind demands that law shall not stop with the punishment of petty crimes by little people. It must also reach men who possess themselves of great power.

I see no reason why I should be consciously wrong today because I was unconsciously wrong yesterday.

I cannot say that our country could have no secret police without becoming totalitarian, but I can say with great conviction that it cannot become totalitarian without a centralized national police.

Due process requires some definite link, some minimum connection, between a state and the person, property or transaction it seeks to tax.

We can have intellectual individualism and the rich cultural diversities that we owe to exceptional minds only at the price of occasional eccentricity and abnormal attitudes. When they are so harmless to others or to the State as those we deal with here, the prices is not too great. But freedom to differ is not limited to things that do not matter much. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order.