I do not say that there is not a wider point of view from which the distinction between law and morals becomes of secondary or no importance, as all mathematical distinctions vanish in presence of the infinite. But I do say that that distinction is of the first importance for the object which we are here to consider--a right study and mastery of the law as a business with well understood limits, a body of dogma enclosed within definite lines. I have just shown the practical reason for saying so. If you want to know the law and nothing else, you must look at it as a bad man, who cares only for the material consequences which such knowledge enables him to predict, not as a good one, who finds his reasons for conduct, whether inside the law or outside of it, in the vaguer sanctions of conscience. The theoretical importance of the distinction is no less, if you would reason on your subject aright. The law is full of phraseology drawn from morals, and by the mere force of language continually invites us to pass from one domain to the other without perceiving it, as we are sure to do unless we have the boundary constantly before our minds. The law talks about rights, and duties, and malice, and intent, and negligence, and so forth, and nothing is easier, or, I may say, more common in legal reasoning, than to take these words in their moral sense, at some state of the argument, and so to drop into fallacy. For instance, when we speak of the rights of man in a moral sense, we mean to mark the limits of interference with individual freedom which we think are prescribed by conscience, or by our ideal, however reached. Yet it is certain that many laws have been enforced in the past, and it is likely that some are enforced now, which are condemned by the most enlightened opinion of the time, or which at all events pass the limit of interference, as many consciences would draw it. Manifestly, therefore, nothing but confusion of thought can result from assuming that the rights of man in a moral sense are equally rights in the sense of the Constitution and the law. No doubt simple and extreme cases can be put of imaginable laws which the statute-making power would not dare to enact, even in the absence of written constitutional prohibitions, because the community would rise in rebellion and fight; and this gives some plausibility to the proposition that the law, if not a part of morality, is limited by it. But this limit of power is not coextensive with any system of morals. For the most part it falls far within the lines of any such system, and in some cases may extend beyond them, for reasons drawn from the habits of a particular people at a particular time. I once heard the late Professor Agassiz say that a German population would rise if you added two cents to the price of a glass of beer. A statute in such a case would be empty words, not because it was wrong, but because it could not be enforced.