Men of today seem to feel more acutely than ever the paradox of their condition. They know themselves to be the supreme end to which all action should be subordinated, but the exigencies of action force them to treat one another as instruments or obstacles, as means. The more widespread their mastery of the world, the more they find themselves crushed by uncontrollable forces.

Part I : Ambiguity and Freedom - The Ethics of Ambiguity (1947)