The invention of gunpowder and the constant improvement of firearms are enough in themselves to show that the advance of civilization has done nothing practical to alter or deflect the impulse to destroy the enemy, which is central to the very idea of war.
Carl von ClausewitzWe repeat again: strength of character does not consist solely in having powerful feelings, but in maintaining oneโs balance in spite of them. Even with the violence of emotion, judgment and principle must still function like a shipโs compass, which records the slightest variations however rough the sea.
Carl von ClausewitzIn short, absolute, so-called mathematical, factors never find a firm basis in military calculations. From the very start, there is an interplay of possibilities, probabilities, good luck and bad, that weaves its way throughout the length and breadth of the tapestry. In the whole range of human activities, war most closely resembles a game of cards.
Carl von Clausewitz