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.
Carl von ClausewitzAlthough our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.
Carl von ClausewitzWith 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.
Carl von Clausewitz