We don't expect the coat that fitted the child to fit the adult without tailoring. Why expect any less of old laws?
The line above is a paraphrase of Thomas Jefferson's actual quote, edited to fit within the constraints of a 140 character tweet, plus link. Full quote:
"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 civilized society to remain ever under the regimen of their barbarous ancestors."