An American can always benefit from rereading the Declaration of Independence. But I suspect that this Fourth of July is better spent with that document’s best interpreter, Abraham Lincoln, beginning with words he uttered after worrying that his countrymen were losing touch with the core ideals of their political inheritance.

“Now, my countrymen, if you have been taught doctrines in conflict with the great landmarks of the Declaration of Independence,” he declared in 1858, “if you have listened to suggestions which would take away from its grandeur and mutilate the fair symmetry of its proportions; if you have been inclined to believe that all men are not created equal in those inalienable rights enumerated in our charter of liberty, let me entreat you to come back. Return to the fountain whose waters spring close by the blood of the revolution. Think nothing of me—take no thought for the political fate of any man whomsoever—but come back to the truths that are in the Declaration of Independence. You may do anything with me you choose, if you will but heed these sacred principles.”

You recall the principles as the authors of the Declaration set them forth: “that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”

Said Lincoln to the Illinois crowd:

This was their majestic interpretation of the economy of the Universe. This was their lofty, and wise, and noble understanding of the justice of the Creator to His creatures. Yes, gentlemen, to all His creatures, to the whole great family of man. In their enlightened belief, nothing stamped with the Divine image and likeness was sent into the world to be trodden on, and degraded, and imbruted by its fellows. They grasped not only the whole race of man then living, but they reached forward and seized upon the farthest posterity. The erected a beacon to guide their children and their children's children, and the countless myriads who should inhabit the earth in other ages. Wise statesmen as they were, they knew the tendency of prosperity to breed tyrants, and so they established these great self-evident truths, that when in the distant future some man, some faction, some interest, should set up the doctrine that none but rich men, or none but white men, were entitled to life, liberty and pursuit of happiness, their posterity might look up again to the Declaration of Independence and take courage to renew the battle which their fathers began — so that truth, and justice, and mercy, and all the humane and Christian virtues might not be extinguished from the land; so that no man would hereafter dare to limit and circumscribe the great principles on which the temple of liberty was being built.

Today that temple of liberty stands taller and stronger than it did at the Founding, or in 1858, or in 1958 for that matter. But any temple can collapse under the stewardship of a generation that fails to sufficiently conserve its foundations and the pillars set atop them.