Read over and over again the campaigns of Alexander, Hannibal, Caesar, Gustavus, Turenne, Eugene and Frederic. ... This is the only way to become a great general and master the secrets of the art of war.
Surely in a matter of this kind we should endeavor to do something, that we may say that we have not lived in vain, that we may leave some impress of ourselves on the sands of time.
Those who failed to oppose me, who readily agreed with me, accepted all my views, and yielded easily to my opinions, were those who did me the most injury, and were my worst enemies, because, by surrendering to me so easily, they encouraged me to go too far... I was then too powerful for any man, except myself, to injure me.