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.
Interesting TED Talk, here:
http://www.ted.com/talks/simon_sinek_how_great_leaders_inspire_action.html
-We usually know WHAT we do
-Some know HOW we do it
-But, do we know WHY?