Of that freedom one may say that it is the matrix, the indispensable condition, of nearly every other form of freedom. With rare aberrations a pervasive recognition of that truth can be traced in our history, political and legal. So it has come about that the domain of liberty, withdrawn by the Fourteenth Amendment from encroachment by the states, has been enlarged by latter-day judgments to include liberty of the mind as well as liberty of action.
5 The extension became, indeed, a logical imperative when once it was recognized, as long ago it was, that liberty is something more than exemption from physical restraint, and that even in the field of substantive rights and duties the legislative judgment, if oppressive and arbitrary, may be overridden by the courts. Cf.
Near v.
Minnesota ex rel. Olson, supra; De Jonge v.
Oregon, supra. Fundamental too in the concept of due process, and so in that of liberty, is the thought that condemnation shall be rendered only after trial.
Scott v. McNeal, 154 U. S. 34;
Blackmer v.
United States, 284 U. S. 421. The hearing, moreover, must be a real one, not a sham or a pretense.
Moore v.
Dempsey, 261 U. S. 86;
Mooney v.
Holohan, 294 U. S. 103. For that reason, ignorant defendants in a capital case were held to have been condemned unlawfully when in truth, though not in form, they were refused the aid of counsel.
Powell v.
Alabama, supra, pp. 67, 68. The decision did not turn upon the fact that the benefit of counsel would have been guaranteed to the defendants by the provisions of the Sixth Amendment if they had been prosecuted in a federal court. The decision turned upon the fact that in the particular situation laid before us in the evidence the benefit of counsel was essential to the substance of a hearing.