"I am aware, of course, that the word intent as vaguely used in ordinary legal discussion means no more than knowledge at the time of the act that the consequences said to be intended will ensue. Even less than that will satisfy the general principle of civil and criminal liability. A man may have to pay damages, may be sent to prison, at common law might be hanged, if, at the time of his act, he knew facts from which common experience showed that the consequences would follow, whether he individually could foresee them or not. But, when words are used exactly, a deed is not done with intent to produce a consequence unless that consequence is the aim of the deed. It may be obvious, and obvious to the actor, that the consequence will follow, and he may be liable for it even if he regrets it, but he does not do the act with intent to produce it unless the aim to produce it is the proximate motive of the specific act, although there may be some deeper motive behind.It seems to me that this statute must be taken to use its words in a strict and accurate sense. They would be absurd in any other. A patriot might think that we were wasting money on aeroplanes, or making more cannon of a certain kind than we needed, and might advocate curtailment with success, yet, even if it turned out that the curtailment hindered and was thought by other minds to have been obviously likely to hinder the United States in the prosecution of the war, no one would hold such conduct a crime. I admit that my illustration does not answer all that might be said, but it is enough to show what I think, and to let me pass to a more important aspect of the case. I refer to the First Amendment to the Constitution, that Congress shall make no law abridging the freedom of speech. I never have seen any reason to doubt that the questions of law that alone were before this Court in the cases of Schenck, Frohwerk and Debs, 249 U. S. 249 U.S. 47, 249 U. S. 204, 249 U. S. 211, were rightly decided. I do not doubt for a moment that, by the same reasoning that would justify punishing persuasion to murder, the United States constitutionally may punish speech that produces or is intended to produce a clear and imminent danger that it will bring about forthwith certain substantive evils that the United States constitutionally may seek to prevent. The power undoubtedly is greater in time of war than in time of peace, because war opens dangers that do not exist at other times. But, as against dangers peculiar to war, as against others, the principle of the right to free speech is always the same. It is only the present danger of immediate evil or an intent to bring it about that warrants Congress in setting a limit to the expression of opinion where private rights are not concerned. Congress certainly cannot forbid all effort to change the mind of the country. Now nobody can suppose that the surreptitious publishing of a silly leaflet by an unknown man, without more, would present any immediate danger that its opinions would hinder the success of the government arms or have any appreciable tendency to do so. Publishing those opinions for the very purpose of obstructing, however, might indicate a greater danger, and, at any rate, would have the quality of an attempt."