“Children are the masters of the new society.”

"Democracy: Its Presumptions and Realities" (1932); also in The Spirit of Liberty: Papers and Addresses (1952), p. 99 - 100.
Extra-judicial writings
Context: When I hear so much impatient and irritable complaint, so much readiness to replace what we have by guardians for us all, those supermen, evoked somewhere from the clouds, whom none have seen and none are ready to name, I lapse into a dream, as it were. I see children playing on the grass; their voices are shrill and discordant as children's are; they are restive and quarrelsome; they cannot agree to any common plan; their play annoys them; it goes poorly. And one says, let us make Jack the master; Jack knows all about it; Jack will tell us what each is to do and we shall all agree. But Jack is like all the rest; Helen is discontented with her part and Henry with his, and soon they fall again into their old state. No, the children must learn to play by themselves; there is no Jack the master. And in the end slowly and with infinite disappointment they do learn a little; they learn to forbear, to reckon with another, accept a little where they wanted much, to live and let live, to yield when they must yield; perhaps, we may hope, not to take all they can. But the condition is that they shall be willing at least to listen to one another, to get the habit of pooling their wishes. Somehow or other they must do this, if the play is to go on; maybe it will not, but there is no Jack, in or out of the box, who can come to straighten the game.

The Newspaper (1785), line 279.

1963, Address in the Assembly Hall at the Paulskirche in Frankfurt
Context: The mission is to create a new social order, rounded on liberty and justice, in which men are the masters of their fate, in which states are the servants of their citizens, and in which all men and women can share a better life for themselves and their children. That is the object of our common policy. To realize this vision, we must seek a world of peace — a world in which peoples dwell together in mutual respect and work together in mutual regard — a world where peace is not a mere interlude between wars, but an incentive to the creative energies of humanity. We will not find such a peace today, or even tomorrow. The obstacles to hope are large and menacing. Yet the goal of a peaceful world — today and tomorrow-must shape our decisions and inspire our purposes. So we are all idealists. We are all visionaries. Let it not be said of this Atlantic generation that we left ideals and visions to the past, nor purpose and determination to our adversaries. We have come too far, we have sacrificed too much, to disdain the future now. And we shall ever remember what Goethe told us — that the "highest wisdom, the best that mankind ever knew" was the realization that "he only earns his freedom and existence who daily conquers them anew."

Source: Marketing Insights from A to Z: 80 Concepts Every Manager Needs to Know, 2011, p. xiv

Variant: The ultimate test of a moral society is the kind of world that it leaves to its children.

TIME interview (1977)
Context: Just look at the scores of thousands of housing tracts in this country, where only parents and children live. Think of the impact on these children who will grow up without close proximity to grandparents. There are certain things that a grandmammy or a granddaddy can do for a child that no one else can. It's sort of like Stardust — the relationship between grandparents and children. The lack of this for many children has to have a negative impact on society. The edges of these children are a little sharper for the lack of it. … I tell young people to go to the oldest members of their family and get as much oral history as possible. Many grandparents carry three or four generations of history in their heads but don't talk about it because they have been ignored. And when the young person starts doing this, the old are warmed to the cockles of their souls and will tell a grandchild everything they can muster.

A Footnote To Rally The Academic, p. 164.
In Defence Of Politics (Second Edition) – 1981

2015, Young African Leaders Initiative Presidential Summit Town Hall speech (August 2015)

“Forced Emigration,” New York Daily Tribune, 22 March 1853.