Page:Joseph Story, Commentaries on the Constitution of the United States (1st ed, 1833, vol I).djvu/448

 408 not as that policy, or that interest may seem now to dictate. We are to construe, and not to frame the instrument.

§ 425. VI. A power, given in general terms, is not to be restricted to particular cases, merely because it may be susceptible of abuse, and, if abused, may lead to mischievous consequences. This argument is often used in public debate; and in its common aspect addresses itself so much to popular fears and prejudices, that it insensibly acquires a weight in the public mind, to which it is no wise entitled. The argument ab inconvenienti is sufficiently open to question, from the laxity of application, as well as of opinion, to which it leads. But the argument from a possible abuse of a power against its existence or use, is, in its nature, not only perilous, but, in respect to governments, would shake their very foundation. Every form of government unavoidably includes a grant of some discretionary powers. It would be wholly imbecile without them. It is impossible to foresee all the exigencies, which may arise in the progress of events, connected with the rights, duties, and operations of a government. If they could be foreseen, it would be impossible ab ante to provide for them. The means must be subject to perpetual modification, and change; they must be adapted to the existing manners, habits, and institutions of society, which are never stationary; to the pressure of dangers, or necessities; to the ends in view; to general and permanent operations, as well as to fugitive and extraordinary emergencies. In short, if the whole society is not to be revolutionized at every critical period, and remodeled in every generation, there must be