"The more physical the activity, the less the difficulties will be. The more the activity becomes intellectual and turns into motives which exercise a determining influence on the commander's will, the more the difficulties will increase."

"...talent and genius operate outside the rules, and theory conflicts with practice."

"...soldierly simplicity of character that has always represented the military at its best. In the higher ranks it is different. The higher a man is placed, the broader his point of view. Different interests and a wide variety of passions, good and bad, will arise on all sides. Envy and generosity, pride and humility, wrath and compassion - all may appear as effective forces in this great drama."

"Modern wars are seldom fought without hatred between nations; this serves more or less as a substitute for hatred between individuals."

"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."

"Everything in war is simple, but the simplest thing is difficult."

"...self-reliance is the best defense against the pressures of the moment."

"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."

"Of all the passions that inspire a man in a battle, none, we have to admit, is so powerful and so constant as the longing for honor and renown."

"... the role of determination is to limit the agonies of doubt and the perils of hesitation when the motives for action are inadequate."

"If the mind is to emerge unscathed from this relentless struggle with the unforeseen, two qualities are indispensable: first, an intellect that, even in the darkest hour, retains some glimmerings of the inner light which leads to truth; and second, the courage to follow this faint light wherever it may lead."

"Any complex activity, if it is to be carried on with any degree of virtuosity, calls for appropriate gifts of intellect and temperament. If they are outstanding and reveal themselves in exceptional achievements, their possessor is called a 'genius'."

"Our discussion has shown that while in war many different roads can lead to the goal, to the attainment of the political object, fighting is the only possible means."

"Blind aggressiveness would destroy the attack itself, not the defense."

"With uncertainty in one scale, courage and self-confidence should be thrown into the other to correct the balance. The greater they are, the greater the margin that can be left for accidents."

"Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating."

"... in the whole range of human activities, war most closely resembles a game of cards."

"...only the element of chance is needed to make war a gamble, and that element is never absent."

"Men are always more inclined to pitch their estimate of the enemy's strength too high than too low, such is human nature."

"The worst of all conditions in which a belligerent can find himself is to be utterly defenseless."

"The invention of gunpowder and the constant improvement of firearms are enough in themselves to show that the advance of civilization has done nothing practical to alter or deflect the impulse to destroy the enemy, which is central to the very idea of war."

"Action in war is like movement in a resistant element. Just as the simplest and most natural of movements, walking, cannot easily be performed in water, so in war it is difficult for normal efforts to achieve even moderate results."

"Wir sagen es also noch einmal: ein starkes Gemüt ist nicht ein solches, welches bloß starker Regungen fähig ist, sondern dasjenige, welches bei den stärksten Regungen im Gleichgewicht bleibt, so daß trotz den Stürmen in der Brust der Einsicht und Überzeugung wie der Nadel des Kompasses auf dem sturmbewegten Schiff das feinste Spiel gestattet ist."

"Die Entschlossenheit ist ein Akt des Mutes in dem einzelnen Fall, und wenn sie zum Charakterzug wird, eine Gewohnheit der Seele. Aber hier ist nicht der Mut gegen körperliche Gefahr, sondern der gegen die Verantwortung, also gewissermaßen gegen Seelengefahr gemeint. Man hat diesen oft courage d'esprit genannt, weil er aus dem Verstande entspringt, aber er ist darum kein Akt des Verstandes, sondern des Gemüts. Bloßer Verstand ist noch kein Mut, denn wir sehen die gescheitesten Leute oft ohne Entschluß. Der Verstand muß also erst das Gefühl des Mutes erwecken, um von ihm gehalten und getragen zu werden, weil im Drange des Augenblicks Gefühle den Menschen stärker beherrschen als Gedanken."

"[...] so sind ihm zwei Eigenschaften unentbehrlich [...] Der erstere ist bildlich mit dem französischen Ausdruck coup d'oeil bezeichnet worden, der andere ist die Entschlossenheit."

"Since war is not an act of senseless passion but is controlled by its political object, the value of this object must determine the sacrifices to be made for it in magnitude and also in duration. Once the expenditure of effort exceeds the value of the political object, the object must be renounced and peace must follow. We see then that if one side cannot completely disarm the other, the desire for peace on either side will rise and fall with the probability of further successes and the amount of effort these would require. If such incentives were of equal strength on both sides, the two would resolve their political disputes by meeting half way. If the incentive grows on one side, it should diminish on the other. Peace will result so long as their sum total is sufficient — though the side that feels the lesser urge for peace will naturally get the better bargain."

"War is an act of violence pushed to its utmost bounds."

"To introduce into the philosophy of War itself a principle of moderation would be an absurdity."