“To have a great capital is not so necessary as to know how to manage a small one, and never to be without a little.”

As quoted by Plutarch, in Lives as translated by J. Langhorne and W. Langhorne (1836), p. 84 http://books.google.com/books?id=UFROAAAAYAAJ&pg=PA84
Variant translation: 'Tis true, I never learned how to tune a harp, or play upon a lute, but I know how to raise a small and inconsiderate city to glory and greatness.
Plutarch's Themistocles, 2:3 http://data.perseus.org/citations/urn:cts:greekLit:tlg0007.tlg010.perseus-eng1:2 "...tuning the lyre and handling the harp were no accomplishments of his, but rather taking in hand a city that was small and inglorious and making it glorious and great" "...λύραν μὲν ἁρμόσασθαι καὶ μεταχειρίσασθαι ψαλτήριον οὐκ ἐπίσταται, πόλιν δὲ μικρὰν καὶ ἄδοξον παραλαβὼν ἔνδοξον καὶ μεγάλην ἀπεργάσασθαι." (at Perseus Project)

Book XLII: Ch. 18: A summary of the changes which have occurred around the globe in my lifetime
Mémoires d'outre-tombe (1848 – 1850)
Context: How small man is on this little atom where he dies! But how great his intelligence! He knows when the face of the stars must be masked in darkness, when the comets will return after thousands of years, he who lasts only an instant! A microscopic insect lost in a fold of the heavenly robe, the orbs cannot hide from him a single one of their movements in the depth of space. What destinies will those stars, new to us, light? Is their revelation bound up with some new phase of humanity? You will know, race to be born; I know not, and I am departing.

Source: The Prince (1513), Ch. 18; translated by ‎Peter Bondanella

Source: A Mother's Advice to Her Son, 1726, p. 160

Listen, Little Man! (1948)
Context: The Little Man does not know that he is little, and he is afraid of knowing it. He covers up his smallness and narrowness with illusions of strength and greatness, of others' strength and greatness. He is proud of his great generals but not proud of himself. He admires thought which he did not have and not the thought he did have. He believes in things all the more thoroughly the less he comprehends them, and does not believe in the correctness of those ideas which he comprehends most easily.

“Interview with Milton Friedman”, Playboy magazine (Feb. 1973)

Rectifying the Errors of the Cuban Revolution (1986)

Letter http://books.google.com/books?id=yEA_AQAAMAAJ&q=%22small+debts+are+like+small+shot+they+are+rattling+on+every+side+and+can+scarcely+be+escaped+without+a+wound+great+debts+are+like+cannon+of+loud+noise+but+little+danger%22&pg=PA189#v=onepage to Joseph Simpson, circa 1759
Life of Samuel Johnson (1791), Vol I

Of Man's Progress in Virtue
Bartlett's Familiar Quotations, 10th ed. (1919)