So, while the people are indeed supreme over the written Constitution, — Constitutions

"A constitution that is made for all nations is made for none; it is a pure abstraction, an academic exercise made according to some hypothetical ideal, which should be addressed to man in his imaginary dwelling place."

"By reducing too the faculty of borrowing within its natural limits, it would bridle the spirit of war, to which too free a course has been procured by the inattention of money -lenders to this law of nature, that succeeding generations are not responsible for the preceding. On similar ground it may be proved that no society can make a perpetual Constitution, or even a perpetual law. The earth belongs always to the living generation. They may manage it then, and what proceeds from it, as they please, during their usufruct. They are masters too of their own persons, and consequently may govern them as they please. But persons and property make the sum of the objects of government. The constitution and the laws of their predecessors extinguished then in their natural course with those who gave them being. This could preserve that being till it ceased to be itself, and no longer. Every constitution then, and every law, naturally expires at the end of 19 years."

"A constitution, as Solon said, is good for a certain people and for a certain time. It shouldn’t be mummified."

"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."

"A constitution is made of a spirit, institutions, and a practice."