Simon Sinek has a simple but powerful model for inspirational leadership all starting with a golden circle and the question "Why?"
His examples include Apple, Martin Luther King, and the Wright brothers -- and as a counterpoint Tivo, which (until a recent court victory that tripled its stock price) appeared to be struggling.
For those of us who sell programs you need to get this piece:
"People don't buy what you do. They buy why you do it."