The military strategist is born not made.
For example:
Two youngsters, one the possessor of a permit, were fishing on a certain estate when a gamekeeper suddenly darted from a thicket. The lad with the permit uttered a cry of fright, dropped his rod, and ran off at top speed. The gamekeeper was led a swift chase. Then, worn out, the boy halted. The man seized him by the arm and said between pants: "Have you a permit to fish on this estate?"
Yes, to be sure, said the boy quietly.
You have? Then show it to me.
The boy drew the permit from his pocket. The man examined it and frowned in perplexity and anger.
Why did you run when you had this permit? he asked.
To let the other boy get away, was the reply. "He didn't have any."