A leader must actively seek as much advice and bad news as possible, and create an atmosphere in which it is easy for people to report bad tidings.
People develop through training.
A leader's first priority should be to cultivate a spirit of self-reliance, and maintain it steadfastly. At the same time, those under his command should also be given the chance to learn to be self-reliant. However independent the leader is, it will not do for his subordinates to be overly reliant on him.