Courtesy of Andrew Goddard, we have two quotes:
"Every constitution, then, and every law, naturally expires at the end
of nineteen years. If it be enforced longer, it is an act of force, and
not of right."--Jefferson to Madison in 1789
"The idea that
institutions established for the use of the nation cannot be touched nor
modified even to make them answer their end because of rights
gratuitously supposed in those employed to manage them in trust for the
public, may perhaps be a salutary provision against the abuses of a
monarch but is most absurd against the nation itself. Yet our lawyers
and priests generally inculcate this doctrine and suppose that preceding
generations held the earth more freely than we do, had a right to
impose laws on us unalterable by ourselves, and that we in like manner
can make laws and impose burdens on future generations which they will
have no right to alter; in fine, that the earth belongs to the dead and
not the living." --Thomas Jefferson to William Plumer, 1816.