Page:Joseph Story, Commentaries on the Constitution of the United States (1st ed, 1833, vol I).djvu/476

 436 terms are used as synonymous. And in another clause, where it is said 'no state shall lay any imposts or duties,' &c. the terms imposts and duties are synonymous. Pleonasms, tautologies, and the promiscuous use of terms and phrases, differing in their shades of meaning, (always to be expounded with reference to the context, and under the control of the general character and scope of the instrument, in which they are found,) are to be ascribed, sometimes to the purposes of greater caution, sometimes to the imperfection of language, and sometimes to the imperfection of man himself. In this view of the subject it was quite natural, however certainly the power to regulate trade might include a power to impose duties on it, not to omit it in a clause enumerating the several modes of revenue authorized by the construction. In few cases could the [rule], ex majori cautela, occur with more claim to respect."

§ 450. We may close this view of some of the more important rules to be employed in the interpretation of the constitution, by adverting to a few belonging to mere verbal criticism, which are indeed but corollaries from what has been said, and have been already alluded to; but which, at the same time, it may be of some use again distinctly to enunciate.

§ 451. XV. In the first place, then, every word employed in the constitution is to be expounded in its plain, obvious, and common sense, unless the context furnishes some ground to control, qualify, or enlarge it. Constitutions are not designed for metaphysical or logical subtleties, for niceties of expression, for critical propriety, for elaborate shades of meaning, or for the exercise of philosophical acuteness, or judicial research.