are themselves the
constitutional judges of their own powers, and that the construction
they put upon them is conclusive upon the other departments, it may be
answered, that this cannot be the natural presumption, where it is not
to be collected from any particular provisions in the Constitution. It
is not otherwise to be supposed, that the Constitution could intend to
enable the representatives of the people to substitute their will to
that of their constituents. It is far more rational to suppose, that the
courts were designed to be an intermediate body between the people and
the legislature, in order, among other things, to keep the latter within
the limits assigned to their authority. The interpretation of the laws
is the proper and peculiar province of the courts. A constitution is,
in fact, and must be regarded by the judges, as a fundamental law.
It therefore belongs to them to ascertain its meaning, as well as the
meaning of any particular act proceeding from the legislative body. If
there should happen to be an irreconcilable variance between the two,
that which has the superior obligation and validity ought, of course, to
be preferred; or, in other words, the Constitution ought to be preferred
to the statute, the intention of the people to the intention of their
agents.

Nor does this conclusion by any means suppose a superiority of the
judicial to the legislative power. It only supposes that the power
of the people is superior to both; and that where the will of the
legislature, declared in its statutes, stands in opposition to that
of the people, declared in the Constitution, the judges ought to be
governed by the latter rather than the former. They ought to regulate
their decisions by the fundamental laws, rather than by those which are
not fundamental.

This exercise of judicial discretion, in determining between two
contradictory laws, is exemplified in a familiar instance. It not
uncommonly happens, that there are two statutes existing at one time,
clashing in whole or in part with each other, and neither of them
containing any repealing clause or expression. In such a case, it is the
province of the courts to liquidate and fix their meaning and operation.
So far as they can, by any fair construction, be reconciled to each
other, reason and law conspire to dictate that this should be done;
where this is impracticable, it becomes a matter of necessity to give
effect to one, in exclusion of the other. T