Knowledge in war is very simple, being concerned with so few subjects, and only with their final results at that. But this does not make its application easy.
Carl von ClausewitzThe only situation a commander can know fully is his own: his opponent's he can know only from unreliable intelligence.
Carl von ClausewitzIf we read history with an open mind, we cannot fail to conclude that, among all the military virtues, the energetic conduct of war has always contributed most to glory and success.
Carl von ClausewitzIntelligence alone is not courage, we often see that the most intelligent people are irresolute. Since in the rush of events a man is governed by feelings rather than by thought, the intellect needs to arouse the quality of courage, which then supports and sustains it in action.
Carl von Clausewitz