Sun Tzu. The art of war (№ 302761)

Here is a case of the commander: he must be always calm and it is impervious to others; he must be very disciplined and to keep the other. He should be able to mislead the eyes and ears of his officers and soldiers, and to prevent that they knew anything. He should change his plans and change their plans and not to let others knew about them. He needs to change his abode, to choose a circuitous routes and not to allow others something to think.