“The whole Earth is the Sepulchre of famous men; and their story is not graven only on Stone over their native earth, but lives on far away, without visible symbol, woven into the stuff of other men's lives.”

Source: Cross Creek

Book 2, chapter 44: Funeral oration, as translated at "In Defense of Democracy" http://www.cooperativeindividualism.org/pericles_in-defense-of-democracy.html
Verse 4 is sometimes freely translated as The secret to happiness is freedom. And the secret to freedom is courage.
History of the Peloponnesian War
Context: I could tell you a long story (and you know it as well as I do) about what is to be gained by beating the enemy back. What I would prefer is that you should fix your eyes every day on the greatness of Athens as she realty is, and should fall in love with her. When you realize her greatness, then reflect that what made her great was men with a spirit of adventure, men who knew their duty, men who were ashamed to fall below a certain standard. If they ever failed in an enterprise, they made up their minds that at any rate the city should not find their courage lacking to her, and they gave to her the best contribution that they could. They gave her their lives, to her and to all of us, and for their own selves they won praises that never grow old, the most splendid of sepulchers — not the sepulchre in which their bodies are laid, but where their glory remains eternal in men's minds, always there on the right occasion to stir others to speech or to action. For famous men have the whole earth as their memorial: it is not only the inscriptions on their graves in their own country that mark them out; no, in foreign lands also, not in any visible form but in people's hearts, their memory abides and grows. It is for you to try to be like them. Make up your minds that happiness depends on being free, and freedom depends on being courageous.

Tout le genre humain n’est qu’une famille dispersée sur la face de toute la terre. Tous les peuples sont frères, et doivent s’aimer comme tels.
Bk. 9, p. 67; translation p. 162.
Les aventures de Télémaque (1699)

Freeman (1948), p. 166
Durant (1939), Ch. XVI, §II, p. 352 (footnote); citing F. Uberweg, History of Philosophy, New York, 1871, vol. 1, p. 71.
Variant: To a wise and good man the whole earth is his fatherland.

As quoted in Flicker to Flame : Living with Purpose, Meaning, and Happiness (2006) by Jeffrey Thompson Parker, p. 118
This quotation is likely a modern paraphrasing of a longer passage from Thucydides' History of the Peloponnesian War, II.43.3.

Vol. 2 "The Art of Literature" as translated in Essays and Aphorisms (1970), as translated by R. J. Hollingdale
Parerga and Paralipomena (1851), Counsels and Maxims
Context: Writers may be classified as meteors, planets, and fixed stars. A meteor makes a striking effect for a moment. You look up and cry “There!” and it is gone forever. Planets and wandering stars last a much longer time. They often outshine the fixed stars and are confounded by them by the inexperienced; but this only because they are near. It is not long before they must yield their place; nay, the light they give is reflected only, and the sphere of their influence is confined to their orbit — their contemporaries. Their path is one of change and movement, and with the circuit of a few years their tale is told. Fixed stars are the only ones that are constant; their position in the firmament is secure; they shine with a light of their own; their effect today is the same as it was yesterday, because, having no parallax, their appearance does not alter with a difference in our standpoint. They belong not to one system, one nation only, but to the universe. And just because they are so very far away, it is usually many years before their light is visible to the inhabitants of this earth.

Quoted from Ram Swarup (2000). On Hinduism: Reviews and reflections, Chapter India and Greece
Different translation: In India I found a race of mortals living upon the Earth, but not adhering to it. Inhabiting cities, but not being fixed to them, possessing everything but possessed by nothing. quoted in The Transition to a Global Society (1991) by Kishor Gandhi, p. 17, and in The Age of Elephants (2006) by Peter Moss, p. v

On Fairy-Stories (1939)

The Crisis No. IV.
1770s, The American Crisis (1776–1783)