Nehemiah 1:11 ASV

Nead to read Marcus Buckingham: The One Thing you need to know.
Great leadership isn't afraid of a vision that is upsurdly larger than oneself. Plan is something you can do-vision is something only God can do. This cultivates utter reliance on Him.
A great leader approaches this God-sized vision with the optimism and quiet confidence that produces shared vision and determination with a majority of the followers. In essence, the leader's 'buy-in' produces and empowers others to 'buy-in' as well. If you don't believe it they won't.
A leader's optimism is encouraging.