“We hold these truths to be self-evident, 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.—That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness.”

1920s, Speech on the Anniversary of the Declaration of Independence (1926)
Context: If all men are created equal, that is final. If they are endowed with inalienable rights, that is final. If governments derive their just powers from the consent of the governed, that is final. No advance, no progress can be made beyond these propositions. If anyone wishes to deny their truth or their soundness, the only direction in which he can proceed historically is not forward, but backward toward the time when there was no equality, no rights of the individual, no rule of the people. Those who wish to proceed in that direction can not lay claim to progress. They are reactionary. Their ideas are not more modern, but more ancient, than those of the Revolutionary fathers.

1850s, The Present Aspect of the Slavery Question (1859)
Context: Such is the present aspect of the slavery question. For myself, I believe that the faith in which the government was founded still survives. I believe that the spirit of despotism which now says to the country, 'I will rule or ruin', will hear the imperial voice of the conscience of the American people, recognizing that justice and prosperity walk hand in hand, saying, 'You will do neither'. I believe that God did not hide this continent through all time as the spot whereon a nation should be planted upon the only principle that can render a nation as permanent as the race, to suffer the experiment to fail within a century. I believe these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain inalienable rights, that among these are life, liberty, and the pursuit of happiness. Do you believe it? If aye, let us go into the battle, and God speed the right.

Source: 2000s, A New Birth of Freedom: Abraham Lincoln and the Coming of the Civil War (2000), p. 231

That is the true genius of America—a faith in simple dreams, an insistence on small miracles.
2004, Democratic National Convention speech (July 2004)

Those are undeniable truths.
Vietnamese Proclamation of Independence (2 September 1945), Ho Chi Minh, Selected Works (1960-1962), Vol. 3, pp. 17-21

Source: Freedom, Loyalty, Dissent (1954), p. 5

1860s, Speech in the House of Representatives (1866)
Context: Have we done it? Have we given freedom to the black man? What is freedom? Is it mere negation? Is it the bare privilege of not being chained, of not being bought and sold, branded and scourged? If this is all, then freedom is a bitter mockery, a cruel delusion, and it may well be questioned whether slavery were not better. But liberty is no negation. It is a substantial, tangible reality. It is the realization of those imperishable truths of the Declaration, 'that all men are created equal'; that the sanction of all just government is 'the consent of the governed.' Can these be realized until each man has a right to be heard on all matters relating to himself?
Context: In the great crisis of the war, God brought us face to face with the mighty truth, that we must lose our own freedom or grant it to the slave. In the extremity of our distress, we called upon the black man to help us save the Republic; and, amid the very thunders of battle, we made a covenant with him, sealed both with his blood and with ours, and witnessed by Jehovah, that, when the nation was redeemed, he should be free, and share with us its glories and its blessings. The Omniscient Witness will appear in judgment against us if we do not fulfill that covenant. Have we done it? Have we given freedom to the black man? What is freedom? Is it mere negation? Is it the bare privilege of not being chained, of not being bought and sold, branded and scourged? If this is all, then freedom is a bitter mockery, a cruel delusion, and it may well be questioned whether slavery were not better. But liberty is no negation. It is a substantial, tangible reality. It is the realization of those imperishable truths of the Declaration, 'that all men are created equal'; that the sanction of all just government is 'the consent of the governed.' Can these be realized until each man has a right to be heard on all matters relating to himself? The plain truth is, that each man knows his own interest best It has been said, 'If he is compelled to pay, if he may be compelled to fight, if he be required implicitly to obey, he should be legally entitled to be told what for; to have his consent asked, and his opinion counted at what it is worth. There ought to be no pariahs in a full-grown and civilized nation, no persons disqualified except through their own default.' I would not insult your intelligence by discussing so plain a truth, had not the passion and prejudice of this generation called in question the very axioms of the Declaration.

1990s, The End of History Means the End of Freedom (1990)

1920s, Equal Rights (1920)
Context: July 4, 1776 was the historic day on which the representatives of three millions of people vocalized Concord, and Lexington, and Bunker Hill, which gave notice to the world that they proposed to establish an independent nation on the theory that all men are created equal, that they are endowed by their creator with certain inalienable rights, that among these are life, liberty, and the pursuit of happiness. The wonder and glory of the American people is not the ringing Declaration of that day, but the action then already begun, and in the process of being carried out, in spite of every obstacle that war could interpose, making the theory of freedom and equality a reality.