Strategy can therefore never take its hand from the work for a moment. - Carl von Clausewitz

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.

The moral elements are among the most important in war. They constitute the spirit that permeates war as a whole, and at an early stage they establish a close affinity with the will that moves and leads a whole mass of force, practically merging with it, since the will is itself a moral quantity. Unfortunately they will not yield to academic wisdom. They cannot be classified or counted. They have to be seen or felt. … It is paltry philosophy if in the old-fashioned way one lays down rules and principles in total disregard of moral values. As soon as these appear one regards them as exceptions, which gives them a certain scientific status, and thus makes them into rules. Or again one may appeal to genius, which is above all rules; which amounts to admitting that rules are not only made for idiots, but are idiotic in themselves.

A conqueror is always a lover of peace (as Bonaparte always asserted of himself); he would like to make his entry into our state unopposed; in order to prevent this, we must choose war, and therefore also make preparations, that is in other words, it is just the weak, or that side which must defend itself, which should be always armed in order not to be taken by surprise; so it is willed by the art of war. (Original German: "Der Eroberer ist immer friedliebend (wie Bonaparte auch stets behauptet hat), er zöge ganz gern ruhig in unseren Staat ein; damit er dies aber nicht könne, darum müssen wir den Krieg wollen und also auch vorbereiten, d. h. mit anderen Worten: es sollen gerade die Schwachen, der Verteidigung Unterworfenen, immer gerüstet sein und nicht überfallen werden; so will es die Kriegskunst.")