as long since expired by its own limitation--we
answer, that, if at any time the foreign slave trade could be
_constitutionally_ prosecuted, it may yet be renewed, under the
Constitution, at the pleasure of Congress, whose prohibitory statute
is liable to be reversed at any moment, in the frenzy of Southern
opposition to emancipation. It is ignorantly supposed that the bargain
was, that the traffic _should cease_ in 1808; but the only thing
secured by it was, the _right_ of Congress (not any obligation) to
prohibit it at that period. If, therefore, Congress had not chosen to
exercise that right, _the traffic might have been prolonged
indefinitely, under the Constitution_. The right to destroy any
particular branch of commerce, implies the right to re-establish it.
True, there is no probability that the African slave trade will ever
again be legalized by the national government; but no credit is due
the framers of the Constitution on this ground; for, while they threw
around it all the sanction and protection of the national character
and power for twenty years, _they set no bounds to its continuance by
any positive constitutional prohibition_.

Again, the adoption of such a clause, and the faithful execution of
it, prove what was meant by the words of the preamble--"to form a more
perfect union, establish justice, insure domestic tranquillity,
provide for the common defence, promote the general welfare, and
secure the blessings of liberty to ourselves and our
posterity"--namely, that the parties to the Constitution regarded
only their own rights and interests, and never intended that its
language should be so interpreted as to interfere with slavery, or to
make it unlawful for one portion of the people to enslave another,
_without an express alteration in the instrument, in the manner
therein set forth_. While, therefore, the Constitution remains as it
was originally adopted, they who swear to support it are bound to
comply with all its provisions, as a matter of allegiance. For it
avails nothing to say, that some of those provisions are at war with
the law of God and the rights of man, and therefore are not
obligatory. Whatever may be their character, they are
_constitutionally_, obligatory; and whoever feels that he cannot
execute them, or swear to execute them, without committing sin,
has no other choice left than to withdraw from the government, or to
violate his conscience by taking on his lips an impious promise.