Some say timing is important, for in the daytime the crow kills the owl - whereas at night, it is the owl who kills the crow. But place and space are important too - for it is by distance and height that the hawk hunts, and nearness and lowness that the wolf attacks. Speed and agility matter little to the ambushed, and all disguise and camouflage has its weakness. There is no fortress which is secure, nor any armor that cannot be pierced. One must be aware of the time, the place, and the relative advantages and disadvantages of an enemy, for though success may be found at first, defeat certainly comes to those who fight too frequently.
Thus must those who would conquer themselves develop courage: for they are certain of their defeat. And therefore certain of their success.