Thucydides (c. 460-400 BCE, speaking in the character of Pericles)
“We regard wealth as something to be properly used, rather than as something to boast about. As for poverty, no one need be ashamed to admit it: the real shame is in not taking practical measures to escape from it.”
- History of the Peloponnesian War (Book II) by Thucydides, translated by Rex Warner (Penguin Classics, 1972). The quote comes from a speech that Thucydides wrote while in the character of the Pericles.