„I have read somewhere or other, — in Dionysius of Halicarnassus, I think, — that history is philosophy teaching by examples.“
— Henry St John, 1st Viscount Bolingbroke
On the Study and Use of History, letter 2; see Dionysius of Halicarnassus (quoting Thucydides), Ars Rhet. xi. 2, says: "The contact with manners then is education; and this Thucydides appears to assert when he says history is philosophy learned from examples".