"War therefore is an act of violence intended to compel our opponent to fulfill our will." (Book I, Chapter I, 2)

"If we desire to defeat the enemy, we must proportion our efforts to his powers of resistance. This is expressed by the product of two factors which cannot be separated, namely, the sum of available means and the strength of the Will." (Book I, Chapter I, 5)

"War is the mere continuation of policy by other means." (Book I, Chapter I, 23)

"Now is there, then, no kind of oil which is capable of diminishing this friction? Only one, and that one is not always available at the will of the Commander or his Army. It is the habituation of an Army to War." (Book I, Chapter III, 81)

"The Art of War is therefore, in its proper sense, the art of making use of the given means in fighting, and...