Every religious, moral, economic, ethical, or other antithesis transforms into a political one if it is sufficiently strong to group human beings effectively according to friend and enemy. The political does not reside in the battle itself, which. possesses its own technical, psychological, and military laws, but in the mode of behavior which is determined by this possibility, by clearly evaluating the concrete situation and thereby being able to distinguish correctly the real friend and the real enemy.

The Concept of the Political (1927)