Opinion, whether well or ill-founded, is the governing principle of human affairs

Schemes to subvert the liberties of a great community require time to mature them for execution.

It may safely be received as an axiom in our political system, that the state governments will in all possible contingencies afford complete security against invasions of the public liberty by the national authority.

It will be of little avail to the people, that the laws are made by men of their own choice, if the laws be so voluminous that they cannot be read, or so incoherent that they cannot be understood; if they be repealed or revised before they are promulgated, or undergo such incessant changes that no man, who knows what the law is to-day, can guess what it will be tomorrow.

There was a time when we were told . . . that a sense of common interest would preside over the conduct of the respective members...This language at the present day would appear as wild as that great part of what we now hear from the same quarter will be thought, when we shall have received further lessons from that best oracle of wisdom, experience.

There are some who maintain that trade will regulate itself, and it is not to be benefited by the encouragements or restraints of government. Such persons will imagine that there is no need of a common directing power. This is one of those wild speculative paradoxes, which have grown into credit among us, contrary to the uniform practice and sense of the most enlightened nations.

[W]e must extend the authority of the Union to the persons of the citizens - the only proper objects of government.