But again and again there comes a time in history when the man dares to say that two and two make four is punished with death. The schoolteacher is well aware of this. And the question is not one of knowing what punishment or reward attends the making of this calculation. The question is that of knowing whether two and two do make four. The essential thing was to save the greatest possible number of persons from dying and being doomed to unending separation. And to do this there was only one resource: to fight the plague. There was nothing admirable about this attitude; it was merely logical.*
(Excerpt from Albert Camus’ The Plague)