by John Marshall Harlan, Arrowsmith v. Gleason — Opinion of the Court
“ The absence of a complete and adequate remedy at law is the only test of equity jurisdiction, and the application of this principle to a particular case must depend on the character of the case as disclosed in the pleadings.' While there are general expressions in some cases apparently asserting a contrary doctrine, the later decisions of this court show that the proper circuit court of the United States may, without controlling, supervising, or annulling the proceedings of state courts, give such relief, in a case like the one before us, as is consistent with the principles of equity. ”
