The Constitution is colorblind, and neither knows nor tolerates classes among citizens.

An unlimited power to tax involves, necessarily, a power to destroy; because there is a limit beyond which no institution and no property can bear taxation.

The people made the Constitution, and the people can unmake it. It is the creature of their will, and lives only by their will.

...the particular phraseology of the Constitution of the United States confirms and strengthens the principle, supposed to be essential to all written constitutions, that a law repugnant to the Constitution is void; and that courts, as well as other departments, are bound by that instrument.

The constitution controls any legislative act repugnant to it.