“This task gratitude to our fathers, justice to ourselves, duty to posterity, and love for our species in general, all imperatively require us faithfully to perform.”

In a debate in the Irish House of Commons on the vote of a grant which was recommended by Sir John Parnell, Chancellor of the Exchequer, as one not likely to be felt burdensome for many years to come, it was observed in reply that the House had no right to load posterity with a debt for what could in no degree operate to their advantage. This quotation was Sir Boyle's response.
[Barrington, Jonah, Personal sketches and recollections of his own times, Chapter XVII https://archive.org/details/personalsketche06barrgoog]

Vol. I : The Dedication (March 1772)
Institutes of Natural and Revealed Religion (1772–1774)
Context: Respect a parliamentary king, and chearfully pay all parliamentary taxes; but have nothing to do with a parliamentary religion, or a parliamentary God.
Religious rights, and religious liberty, are things of inestimable value. For these have many of our ancestors suffered and died; and shall we, in the sunshine of prosperity, desert that glorious cause, from which no storms of adversity or persecution could make them swerve? Let us consider if as a duty of the first rank with respect to moral obligation, to transmit to our posterity, and provide, as far as we can, for transmitting, unimpaired, to the latest generations, that generous zeal for religion and liberty, which makes the memory of our forefathers so truly illustrious.

2013, Second Inaugural Address (January 2013)
Context: We, the people, still believe that our obligations as Americans are not just to ourselves, but to all posterity.  We will respond to the threat of climate change, knowing that the failure to do so would betray our children and future generations. Some may still deny the overwhelming judgment of science, but none can avoid the devastating impact of raging fires and crippling drought and more powerful storms. The path towards sustainable energy sources will be long and sometimes difficult. But America cannot resist this transition, we must lead it. We cannot cede to other nations the technology that will power new jobs and new industries, we must claim its promise. That’s how we will maintain our economic vitality and our national treasure -- our forests and waterways, our crop lands and snow-capped peaks. That is how we will preserve our planet, commanded to our care by God. That’s what will lend meaning to the creed our fathers once declared.

Foreword (1956), to The Rebel (1951) by Albert Camus
Other Quotes
Context: All revolutions in modern times, Camus points out, have led to a reinforcement of the power of the State.
"The strange and terrifying growth of the modern State can be considered as the logical conclusion of inordinate technical and philosophical ambitions, foreign to the true spirit of rebellion, but which nevertheless gave birth to the revolutionary spirit of our time. The prophetic dream of Marx and the over-inspired predictions of Hegel or of Nietzsche ended by conjuring up, after the city of God had been razed to the ground, a rational or irrational State, which in both cases, however, was founded on terror." The counterrevolutions of fascism only serve to reinforce the general argument.
Camus shows the real quality of his thought in his final pages. It would have been easy, on the facts marshaled in this book, to have retreated into despair or inaction. Camus substitutes the idea of "limits." "We now know, at the end of this long inquiry into rebellion and nihilism, that rebellion with no other limits but historical expediency signifies unlimited slavery. To escape this fate, the revolutionary mind, if it wants to remain alive, must therefore, return again to the sources of rebellion and draw its inspiration from the only system of thought which is faithful to its origins: thought that recognizes limits." To illustrate his meaning Camus refers to syndicalism, that movement in politics which is based on the organic unity of the cell, and which is the negation of abstract and bureaucratic centralism. He quotes Tolain: "Les etres humains ne s'emancipent qu'au sein des groupes naturels" — human beings emancipate themselves only on the basis of natural groups. "The commune against the State... deliberate freedom against rational tyranny, finally altruistic individualism against the colonization of the masses, are, then, the contradictions that express once again the endless opposition of moderation to excess which has animated the history of the Occident since the time of the ancient world." This tradition of "mesure" belongs to the Mediterranean world, and has been destroyed by the excesses of German ideology and of Christian otherworldliness — by the denial of nature.
Restraint is not the contrary of revolt. Revolt carries with it the very idea of restraint, and "moderation, born of rebellion, can only live by rebellion. It is a perpetual conflict, continually created and mastered by the intelligence.... Whatever we may do, excess will always keep its place in the heart of man, in the place where solitude is found. We all carry within us our places of exile, our crimes and our ravages. But our task is not to unleash them on the world; it is to fight them in ourselves and in others.

Diary entry (29 December 1848).
Context: No president who performs his duties faithfully and conscientiously can have any leisure. If he entrusts the details and smaller matters to subordinates constant errors will occur. I prefer to supervise the whole operations of the government myself rather than entrust the public business to subordinates, and this makes my duties very great.

Stenberg v. Carhart (2000) (dissenting).
2000s

1980s, First term of office (1981–1985), First Inaugural address (1981)
Context: Directly in front of me, the monument to a monumental man, George Washington, father of our country. A man of humility who came to greatness reluctantly. He led Americans out of revolutionary victory into infant nationhood. Off to one side, the stately memorial to Thomas Jefferson. The Declaration of Independence flames with his eloquence. And then, beyond the Reflecting Pool, the dignified columns of the Lincoln Memorial. Whoever would understand in his heart the meaning of America will find it in the life of Abraham Lincoln.
Beyond those monuments to heroism is the Potomac River, and on the far shore the sloping hills of Arlington National Cemetery, with its row upon row of simple white markers bearing crosses or Stars of David. They add up to only a tiny fraction of the price that has been paid for our freedom. Each one of those markers is a monument to the kind of hero I spoke of earlier. Their lives ended in places called Belleau Wood, the Argonne, Omaha Beach, Salerno, and halfway around the world on Guadalcanal, Tarawa, Pork Chop Hill, the Chosin Reservoir, and in a hundred rice paddies and jungles of a place called Vietnam.
Under one such marker lies a young man, Martin Treptow, who left his job in a small town barber shop in 1917 to go to France with the famed Rainbow Division. There, on the western front, he was killed trying to carry a message between battalions under heavy artillery fire.
We are told that on his body was found a diary. On the flyleaf under the heading, "My Pledge," he had written these words: "America must win this war. Therefore, I will work, I will save, I will sacrifice, I will endure, I will fight cheerfully and do my utmost, as if the issue of the whole struggle depended on me alone."
The crisis we are facing today does not require of us the kind of sacrifice that Martin Treptow and so many thousands of others were called upon to make. It does require, however, our best effort and our willingness to believe in ourselves and to believe in our capacity to perform great deeds, to believe that together with God's help we can and will resolve the problems which now confront us. And after all, why shouldn't we believe that? We are Americans.

From ‘A Duty to Posterity’, as contained in A Library of American Literature From the Earliest Settlement to the Present Time, Volume 3, ed. Edmund Clarence Stedman, C. L. Webster (1892), pp. 177-178

The Honest Man's Fortune, (1613; published 1647)