The single best sentence about leadership | (How to define leadership)

What is the best sentence about leadership? I say it at the end of every episode of my podcast.
I will tell you what leadership is and how it works in this sentence. I will provide you with famous leadership quotes. I will provide a leadership definition.
What I am telling you about leadership is leadership in management, sports, the church, and the military. It is arguably the best style of leadership. All leadership skills build on this.
What is it? Why is this sentence about leadership important? Watch the video to find out.