I am certainly not an advocate for frequent & 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 civilised society to remain ever under the regimen of their barbarous ancestors.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)

Letter (1816-07-12) to “Henry Tompkinson” (Samuel Kercheval)
    (Source)

Inscribed (elided) on southeast side of the Jefferson Memorial:

I am not an advocate for frequent changes in laws and constitutions, but 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 discovered and manners and opinions change, with the change of circumstances, institutions must advance also to keep pace with the times. We might as well require a man to wear still the coat which fitted him when a boy as a civilized society to remain ever under the regimen of their barbarous ancestors.