“Our fathers did not say it, because they did not mean it. They were men who meant what they said, and who said what they meant, and meaning all men, they said all men. They were patriots asserting a principle and ready to die for it, not politicians pettifogging for the presidency”

James Madison Lecture at the New York University School of Law (February 17, 1960).

Religion and the rise of modern science, 1972

Source: The Lovely Bones

This they said, and this meant. They did not mean to assert the obvious untruth, that all were then actually enjoying that equality, nor yet, that they were about to confer it immediately upon them. In fact they had no power to confer such a boon. They meant simply to declare the right, so that the enforcement of it might follow as fast as circumstances should permit. They meant to set up a standard maxim for free society, which should be familiar to all, and revered by all; constantly looked to, constantly labored for, and even though never perfectly attained, constantly approximated, and thereby constantly spreading and deepening its influence, and augmenting the happiness and value of life to all people of all colors everywhere. The assertion that "all men are created equal" was of no practical use in effecting our separation from Great Britain; and it was placed in the Declaration, nor for that, but for future use. Its authors meant it to be, thank God, it is now proving itself, a stumbling block to those who in after times might seek to turn a free people back into the hateful paths of despotism. They knew the proneness of prosperity to breed tyrants, and they meant when such should re-appear in this fair land and commence their vocation they should find left for them at least one hard nut to crack. I have now briefly expressed my view of the meaning and objects of that part of the Declaration of Independence which declares that "all men are created equal".
1850s, Speech on the Dred Scott Decision (1857)

Source: The Duke's Children (1879), Ch. 48

2010s, 2019, June, Remarks on the 75th Anniversary of D-Day in Colleville-sur-Mer, France

Speech in Reply to Senator Stephen Douglas in the Lincoln-Douglas debates http://www.bartleby.com/251/1003.html of the 1858 campaign for the U.S. Senate, at Chicago, Illinois (10 July 1858)
1850s, Lincoln–Douglas debates (1858)
Context: Now, it happens that we meet together once every year, sometimes about the fourth of July, for some reason or other. These fourth of July gatherings I suppose have their uses. … We are now a mighty nation; we are thirty, or about thirty, millions of people, and we own and inhabit about one-fifteenth part of the dry land of the whole earth. We run our memory back over the pages of history for about eighty-two years, and we discover that we were then a very small people in point of numbers, vastly inferior to what we are now, with a vastly less extent of country, with vastly less of everything we deem desirable among men; we look upon the change as exceedingly advantageous to us and to our posterity, and we fix upon something that happened away back, as in some way or other being connected with this rise of prosperity. We find a race of men living in that day whom we claim as our fathers and grandfathers; they were iron men; they fought for the principle that they were contending for; and we understood that by what they then did it has followed that the degree of prosperity which we now enjoy has come to us. We hold this annual celebration to remind ourselves of all the good done in this process of time, of how it was done and who did it, and how we are historically connected with it; and we go from these meetings in better humor with ourselves, we feel more attached the one to the other, and more firmly bound to the country we inhabit. In every way we are better men in the age, and race, and country in which we live, for these celebrations. But after we have done all this we have not yet reached the whole. There is something else connected with it. We have besides these, men descended by blood from our ancestors — among us, perhaps half our people, who are not descendants at all of these men; they are men who have come from Europe — German, Irish, French and Scandinavian — men that have come from Europe themselves, or whose ancestors have come hither and settled here, finding themselves our equals in all things. If they look back through this history to trace their connection with those days by blood, they find they have none, they cannot carry themselves back into that glorious epoch and make themselves feel that they are part of us, but when they look through that old Declaration of Independence, they find that those old men say that "We hold these truths to be self-evident, that all men are created equal" and then they feel that that moral sentiment taught in that day evidences their relation to those men, that it is the father of all moral principle in them, and that they have a right to claim it as though they were blood of the blood, and flesh of the flesh, of the men who wrote that Declaration; and so they are. That is the electric cord in that Declaration that links the hearts of patriotic and liberty-loving men together, that will link those patriotic hearts as long as the love of freedom exists in the minds of men throughout the world.

Source: Froi of the Exiles

Thales, 9.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 1: The Seven Sages