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.

If certain acts in violation of treaties are crimes, they are crimes whether the United States does them or whether Germany does them, and we are not prepared to lay down a rule of criminal conduct against others which we would not be willing to have invoked against us.

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.

Particularly when the war power is invoked to do things to the liberties of people, or to their property or economy that only indirectly affect conduct of the war and do not relate to the engagement of the war itself, the constitutional basis should be scrutinized with care. ... I would not be willing to hold that war powers may be indefinitely prolonged merely by keeping legally alive a state of war that had in fact ended. I cannot accept the argument that war powers last as long as the effects and consequences of war for if so they are permanent -- as permanent as the war debts.

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.

While the Nation has forbidden monopoly by one set of laws it has been creating them by another. Patent laws, valuable as they may be in some respects, often father monopoly.