If, therefore, … the people should in the future become more partial to the federal than to the State governments, the change can only result, from such manifest and irresistible proofs of a better administration, as will overcome all their antecedent propensities. … But even in that case, the State governments could have little to apprehend, because it is only within a certain sphere, that the federal power can, in the nature of things, be advantageously administered.
James Madison in Federalist No. 46
Jnana's Red Barn 