Laudator Temporis Acti

Thomas Jefferson, letter to Samuel Kercheval (July 12, 1816), in The Complete Jefferson, ed. Saul K. Padover (New York: Tudor Publishing Company, 1943), p. 291:

Some men look at constitutions with sanctimonious reverence, and deem them like the ark of the covenant, too sacred to be touched. They ascribe to the men of the preceding age a wisdom more than human, and suppose what they did to be beyond amendment. I knew that age well; I belonged to it, and labored with it. It deserved well of its country. It was very like the present, but without the experience of the present; and forty years of experience in government is worth a century of book-reading; and this they would say themselves, were they to rise from the dead. I am certainly not an advocate for frequent and untried changes in laws and constitutions. I think moderate imperfections had better be borne with; because, when once known, we accommodate ourselves to them, and find practical means of correcting their ill effects. But I know also, that laws and institutions must go hand in hand with the progress of the human mind. As that becomes more developed, more enlightened, as new discoveries are made, new truths disclosed, and manners and opinions change with the change of circumstances, institutions must advance also, and keep pace with the times. We might as well require a man to wear still the coat which fitted him when a boy, as civilized society to remain ever under the regimen of their barbarous ancestors.

Id., p. 292:

Each generation is as independent as the one preceding, as that was of all which had gone before. It has then, like them, a right to choose for itself the form of government it believes most promotive of its own happiness; consequently, to accommodate to the circumstances in which it finds itself, that received from its predecessors; and it is for the peace and good of mankind, that a solemn opportunity of doing this every nineteen or twenty years, should be provided by the constitution; so that it may be handed on, with periodical repairs, from generation to generation, to the end of time, if anything human can so long endure. It is now forty years since the constitution of Virginia was formed. The same tables [of mortality] inform us, that, within that period, two-thirds of the adults then living are now dead. Have then the remaining third, even if they had the wish, the right to hold in obedience to their will, and to laws heretofore made by them, the other two-thirds, who, with themselves, compose the present mass of adults? If they have not, who has? The dead? But the dead have no rights. They are nothing; and nothing cannot own something. Where there is no substance, there can be no accident. This corporeal globe, and everything upon it, belong to its present corporeal inhabitants, during their generation. They alone have a right to direct what is the concern of themselves alone, and to declare the law of that direction; and this declaration can only be made by their majority.

Thomas Jefferson, Second Inaugural Address (referring to those Indians who refused to abandon a nomadic life in favor of a settled, agricultural one), in The Complete Jefferson, p. 455:

These persons inculcate a sanctimonious reverence for the customs of their ancestors; that whatsoever they did, must be done through all time; that reason is a false guide, and to advance under its counsel, in their physical, moral, or political condition, is perilous innovation; that their duty is to remain as their Creator made them, ignorance being safety, and knowledge full of danger; in short, my friends, among them is seen the action and counteraction of good sense and bigotry; they, too, have their anti-philosophers, who find an interest in keeping things in their present state, who dread reformation, and exert all their faculties to maintain the ascendency of habit over the duty of improving our reason, and obeying its mandates.