Be content with what you are and wish not change nor dread your last day nor long for it.
Begin - to begin is half the work let half still remain again begin this...
You do have to change things as warfare changes.
All that is necessary to break the spell of inertia and frustration is this: Act as if it were impossible to fail. That is the talisman the formula the command of right about face which turns us from failure to success.
