Leaders are people who do the right thing; managers are people who do things right.

Warren G. Bennis
Profession: Author
Nationality: American
Some suggestions for you :
The manager has his eye on the bottom line; the leader has his eye on the horizon.
Great Groups need to know that the person at the top will fight like a tiger for them.
The manager asks how and when; the leader asks what and why.
Success in management requires learning as fast as the world is changing.
The manager accepts the status quo; the leader challenges it.