"(...) any definition is a prison. And because the human sciences, like men themselves, need freedom above all else. A definition of history? Which history? I mean at what date and in what framework of civilisation? Does history not vary, all the time, in its restless search for new techniques, new points of view, problems needing to be put more aptly? Definitions - do not the most precise definitions, the most carefully thought out and most meticulously phrased definitions run the risk of constantly leaving aside the best part of history"
(Lucien Febvre (1949) Review of "The Historian's Craft" by Marc Bloch)