Everything in war is simple, but the simplest thing is difficult. - Carl von Clausewitz

Strength of character does not consist solely in having powerful feelings, but in maintaining one’s balance in spite of them. Even with the violence of emotion, judgment and principle must still function like a ship’s compass, which records the slightest variations however rough the sea.

they realise that the gradual dissemination of the principles taught by Clausewitz has created a condition of molecular tension in the minds of the Nations they govern analogous to the “critical temperature of water heated above boiling-point under pressure,” which may at any moment bring about an explosion which they will be powerless to control.

Der Krieg ist eine bloße Fortsetzung der Politik mit anderen Mitteln