"A heavy or graduated income tax is necessary for the development of communism."
"All Duties, Imposts and Excises shall be uniform throughout the United States."
"The moment you abandon the cardinal principle of exacting from all individuals the same proportion of their income or of their profits you are at a sea without a rudder or compass and there is no amount of injustice and folly you may commit."
"The principle of equality in taxation is in itself so just and so reasonable, and so generally has it been acquiesced in, that no argument is needed to sustain the position that the legislature in deliberately violating this principle does nothing else than convert what purports to be a statute law into an exercise of arbitrary power, which in reality is no law at all. When the question is put, does a graduated tax conform to the rule of equality, but one answer can be returned."