History of the Peloponnesian War

Indeed, even if we leave Athens with a force not only equal to that of the enemy except in the number of heavy infantry in the field, but even at all points superior to him, we shall still find it difficult to conquer Sicily or save ourselves.

We must not disguise from ourselves that we go to found a city among strangers and enemies, and that he who undertakes such an enterprise should be prepared to become master of the country the first day he lands, or failing in this to find everything hostile to him.