St. George Tucker, Blackstone's Commentaries 1:App. 371--721803
11. Lastly; the fifth article provides the mode by which future amendments to the constitution may be proposed, discussed, and carried into effect, without hazarding a dissolution of the confederacy, or suspending the operations of the existing government. And this may be effected in two different modes: the first on recommendation from congress, whenever two thirds of both houses shall concur in the expediency of any amendment. The second, which secures to the states an influence in case congress should neglect to recommend such amendments, provides, that congress shall, on application from the legislatures of two thirds of the states, call a convention for proposing amendments; which in either case shall be valid to all intents and purposes as part of the constitution, when ratified by the legislatures of three fourths of the several states, or by conventions in three fourths thereof, as the one or the other mode, of the ratification may be proposed by the congress. Both of these provisions appear excellent. Of the utility and practicability of the former, we have already had most satisfactory experience. The latter will probably never be resorted to, unless the federal government should betray symptoms of corruption, which may render it expedient for the states to exert themselves in order to the application of some radical and effectual remedy. Nor can we too much applaud a constitution, which thus provides a safe, and peaceable remedy for its own defects, as they may from time to time be discovered. A change of government in other countries is almost always attended with convulsions which threaten its entire dissolution; and with scenes of horror, which deter mankind from any attempt to correct abuses, or remove oppressions until they have become altogether intolerable. In America we may reasonably hope, that neither of these evils need be apprehended; nor is there any reason to fear that this provision in the constitution will produce any degree of instability in the government; the mode both of originating and of ratifying amendments, in either mode which the constitution directs, must necessarily be attended with such obstacles, and delays, as must prove a sufficient bar against light, or frequent innovations. And as a further security against them, the same article further provides, that no amendment which may be made, prior to the year one thousand eight hundred and eight, shall, in any manner, affect those clauses of the ninth section of the first article, which relate to the migration or importation of such persons as the states may think proper to allow; and to the manner in which direct taxes shall be laid: and that no state, without its consent shall be deprived of its equal suffrage in the senate.
The Founders' Constitution
Volume 4, Article 5, Document 11
The University of Chicago Press
Tucker, St. George. Blackstone's Commentaries: With Notes of Reference to the Constitution and Laws of the Federal Government of the United States and of the Commonwealth of Virginia. 5 vols. Philadelphia, 1803. Reprint. South Hackensack, N.J.: Rothman Reprints, 1969.