Four elements make up the climate of war: danger, exertion, uncertainty and chance.

The Conqueror is always a lover of peace: he would prefer to take over our country unopposed.

No one starts a war--or rather, no one in his sense ought to do so--without first being clear in his mind what he intends to achieve by the war and how he intends to conduct it.

Kind-hearted people might of course think there was some ingenious way to disarm or defeat an enemy without too much bloodshed, and might imagine this is the true goal of the art of war. Pleasant as it sounds; it is a fallacy that must be exposed: War is such a dangerous business that the mistakes which come from kindness are the very worst.

Architects 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.

Obstinacy is a fault of temperament. Stubbornness and intolerance of contradiction result from a special kind of egotism, which elevates above everything else the pleasure of its autonomous intellect, to which others must bow.

The world has a way of undermining complex plans. This is particularly true in fast moving environments. A fast moving environment can evolve more quickly than a complex plan can be adapted to it. By the time you have adapted, the target has changed.