““But we do not congratulate a schoolmaster on teaching that two and two make four, though we may, perhaps, congratulate him on having chosen his laudable vocation...But again and again there comes a time in history when the man who dares to say that two and two make four is punished with death. The schoolmaster 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.””
