We are so little capable of arguing a priori in matters of government, that it should seem, experiments only can determine how far this power of the legislature ought to extend; and it should likewise seem, that, till a sufficient number of experiments have been made, it becomes the wisdom of the civil magistracy to take as little upon its hands as possible, and never to interfere, without the greatest caution, in things that do not immediately affect the lives, liberty, or property of the members of the community; that civil magistrates should hardly ever be moved to exert themselves by the mere tendencies of things, those tendencies are generally so vague, and often so imaginary; and that nothing but a manifest and urgent necessity (of which, however, themselves are, to be sure, the only judges) can justify them in extending their authority to whatever has no more than a tendency, though the strongest possible, to disturb the tranquility and happiness of the state.
