Four elements make up the climate of war: danger, exertion, uncertainty and chance.
Carl von ClausewitzArchitects and painters know precisely what they are about as long as they deal with material phenomena.... But when they come to the aesthetics of their work, when they aim at a particular effect on the mind or on the senses, the rules dissolve into nothing but vague ideas.
Carl von ClausewitzKnowing is different from doing and therefore theory must never be used as norms for a standard, but merely as aids to judgment.
Carl von ClausewitzPrinciples and rules are intended to provide a thinking man with a frame of reference.
Carl von Clausewitz