History of the Peloponnesian War

For also in this we excel others, daring to undertake as much as any and yet examining what we undertake; whereas with other men ignorance makes them dare, and consideration dastards. And they are most rightly reputed valiant who, though they perfectly apprehend both what is dangerous and what is easy, are never the more thereby diverted from adventuring. Again, we are contrary to most men in matter of bounty.

For we purchase our friends not by receiving but by bestowing benefits. And he that bestoweth a good turn is ever the most constant friend because he will not lose the thanks due unto him from him whom he bestowed it on. Whereas the friendship of him that oweth a benefit is dull and flat, as knowing his benefit not to be taken for a favour but for a debt.

So that we only do good to others not upon computation of profit but freeness of trust.

"In sum it may be said both that the city is in general a school of the Grecians, and that the men here have everyone in particular his person disposed to most diversity of actions, and yet all with grace and decency.