You can't do it all? Then say so...

Saying you can't do it all is not a failure of leadership, it is effective leadership. But despite all the books and articles, like Jim Collins' Good to Great, that preach such reasonable humility, the culture of heroic leadership persists. Consequently, resources are wasted, false hopes are raised, and quagmires persist. When a leader comes along who is willing to offer a realistic assessment of strengths and weaknesses, and to state what an organization — or nation — should not do or should stop doing, that leader should be received with gratitude and not mockery.

from Good Leaders Acknowledge What Can't Be Done.