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.
There is no man more pusillanimous than I when I am planning a campaign. I purposely exaggerate all the dangers and all the calamities that the circumstances make possible. I am in a thoroughly painful state of agitation. This does not keep me from looking quite serene in front of my entourage; I am like an unmarried girl laboring with child. Once I have made up my mind, everything is forgotten except what leads to success.