This Court, limited in function in accordance with that premise, does not serve its high purpose when it exceeds its authority, even to satisfy justified impatience with the slow workings of the political process. For when, in the name of constitutional interpretation, the Court adds something to the Constitution that was deliberately excluded from it, the Court, in reality, substitutes its view of what should be so for the amending process.

Dissenting in Reynolds v. Sims, 377 U.S. 533, 624-25 (1964).