Leadership is about influence, but it is also about vision. A leader has to have the vision to see the "light at the end of the tunnel." If a leader doesn't have a vision of the end result that they can communicate, then people will not follow; but instead, stumble off in a different direction. I shared this thought with the post The Quandry of Leadership, where we discussed how a leader has to be an optimist and a realist. See and provide the light of the vision (optimist) and provide real explanations and understanding of the challenges the team faces (realist).
In fact, a leader sometimes needs to be like Butch in Butch Cassidy and the Sundance Kid:
When the rest of the team is seeing problems, you see solutions and the end goal, because you have vision while the team is wearing bifocals.