Because of this immense power to strike at citizens, not with mere individual strength, but with all the force of government itself, the post of fede… - Robert H. Jackson

A military order, however unconstitutional, is not apt to last longer than the military emergency. Even during that period, a succeeding commander may revoke it all. But once a judicial opinion rationalizes such an order to show that it conforms to the Constitution, or rather rationalizes the Constitution to show that the Constitution sanctions such an order, the Court for all time has validated the principles of racial discrimination in criminal procedure, and of transplanting American citizens. The principle then lies about like a loaded weapon, ready for the hand of any authority that can bring forward a plausible claim of an urgent need. Every repetition imbeds that principle more deeply in our law and thinking, and expands it to new purposes.

But we must not forget that in our country are evangelists and zealots of many different political, economic and religious persuasions whose fanatical conviction is that all thought is divinely classified into two kinds — that which is their own and that which is false and dangerous.

The plans of Adolf Hitler for aggression were just as secret as Mein Kampf, of which over six million copies were published in Germany. He not only openly advocated overthrowing the Treaty of Versailles, but made demands which went far beyond a mere rectification of its alleged injustices (GB-128). He avowed an intention to attack neighboring states and seize their lands, which he said would have to be won with "the power of a triumphant sword." Here, for every German to hearken to, were the "ancestral voices prophesying war."