„Exactly as each man, while doing first his duty to his wife and the children within his home, must yet, if he hopes to amount to much, strive mightily in the world outside his home, so our nation, while first of all seeing to its own domestic well-being, must not shrink from playing its part among the great nations without. Our duty may take many forms in the future as it has taken many forms in the past. Nor is it possible to lay down a hard-and-fast rule for all cases. We must ever face the fact of our shifting national needs, of the always-changing opportunities that present themselves. But we may be certain of one thing: whether we wish it or not, we cannot avoid hereafter having duties to do in the face of other nations. All that we can do is to settle whether we shall perform these duties well or ill.“

— Theodore Roosevelt

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„A man's first duty is to his own home, but he is not thereby excused from doing his duty to the State; for if he fails in this second duty it is under the penalty of ceasing to be a freeman. In the same way, while a nation's first duty is within its own borders, it is not thereby absolved from facing its duties in the world as a whole; and if it refuses to do so, it merely forfeits its right to struggle for a place among the peoples that shape the destiny of mankind.“
— Theodore Roosevelt
„Each one must do his part if we wish to show that the nation is worthy of its good fortune.“
— Theodore Roosevelt
„You cannot hope to build a better world without improving the individuals. To that end each of us must work for his own improvement, and at the same time share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.“
— Marie Curie
„The willfully idle man, like the willfully barren woman, has no place in a sane, healthy, and vigorous community. Moreover, the gross and hideous selfishness for which each stands defeats even its own miserable aims. Exactly as infinitely the happiest woman is she who has borne and brought up many healthy children, so infinitely the happiest man is he who has toiled hard and successfully in his life-work. The work may be done in a thousand different ways —with the brain or the hands, in the study, the field, or the workshop—if it is honest work, honestly done and well worth doing, that is all we have a right to ask. Every father and mother here, if they are wise, will bring up their children not to shirk difficulties, but to meet them and overcome them; not to strive after a life of ignoble ease, but to strive to do their duty, first to themselves and their families, and then to the whole state; and this duty must inevitably take the shape of work in some form or other.“
— Theodore Roosevelt
„We have no choice, we people of the United States, as to whether or not we shall play a great part in the world. That has been determined to us by fate, by the march of events. We have to play that part. All that we can decide is whether we shall play it well or ill.“
— Theodore Roosevelt
„We, the men of to-day and of the future, need many qualities if we are to do our work well. We need, first of all and most important of all, the qualities which stand at the base of individual, of family life, the fundamental and essential qualities—the homely, every-day, all-important virtues. If the average man will not work, if he has not in him the will and the power to be a good husband and father; if the average woman is not a good housewife, a good mother of many healthy children, then the state will topple, will go down, no matter what may be its brilliance of artistic development or material achievement. But these homely qualities are not enough. There must, in addition, be that power of organization, that power of working in common for a common end […]. Moreover, the things of the spirit are even more important than the things of the body. We can well do without the hard intolerance and arid intellectual barrenness of what was worst in the theological systems of the past, but there has never been greater need of a high and fine religious spirit than at the present time. So, while we can laugh good-humoredly at some of the pretensions of modern philosophy in its various branches, it would be worse than folly on our part to ignore our need of intellectual leadership. […] our debt to scientific men is incalculable, and our civilization of to-day would have reft from it all that which most highly distinguishes it if the work of the great masters of science during the past four centuries were now undone or forgotten. Never has philanthropy, humanitarianism, seen such development as now; and though we must all beware of the folly, and the viciousness no worse than folly, which marks the believer in the perfectibility of man when his heart runs away with his head, or when vanity usurps the place of conscience, yet we must remember also that it is only by working along the lines laid down by the philanthropists, by the lovers of mankind, that we can be sure of lifting our civilization to a higher and more permanent plane of well-being than was ever attained by any preceding civilization.“
— Theodore Roosevelt