Knowing is different from doing and therefore theory must never be used as norms for a standard, but merely as aids to judgment.
War is the domain of physical exertion and suffering.
War should never be thought of as something autonomous, but always as an instrument of policy.
Courage, above all things, is the first quality of a warrior.
All war presupposes human weakness and seeks to exploit it.
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.