"If your actions inspire others to dream more, learn more, do more, and become more you are a leader." - John Quincy Adams

Motivation
To me, the foundation of this quote is "motivation." To be a good leader, you have to MOTIVATE the people around you to help you get to your goal, the change you want to see happen. In my opinion, there has never been a leader who hasn't been able to motivate, whether it be by charisma or pure force. Of course, leaders who can motivate individuals without the use of force or bribes are by far the most motivating.

Lead by example
Here is a basic example:
Bill is the executive of a company who goes out into the community to build ramps for handicapped individuals. Bill is teaching students who are volunteering how to build a ramp. Bill hands the blueprints to one of the volunteers and points to all of the materials behind his truck.
Now, which of the below situations is going to motivate you to build this ramp

A. Bill drives off.
B. Bill delegates responsibilities to all of the volunteers and begins to saw pieces of wood.

Obviously the correct answer is B! Bill leads by example, Bill needs to work harder than anybody else so the volunteers are motivated and less likely to slack off.