"A leader has the vision and conviction that a dream can be achieved. He inspires the power and energy to get it done." - Ralph Lauren

"Leadership is communicating a person's worth and potential so clearly that they are inspired to see it in themselves." -Stephen R. Covey

“Leadership is the capacity and will to rally men and women to a common purpose and the character which inspires confidence." -Bernard Montgomery

"The world has the habit of making room for the man whose words and actions show that he knows where he is going." - Napoleon Hill

“Example is leadership.” -Albert Schweitzer

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

For me, in sum, it comes down to someone devoted to a noble cause or vision--greater than him or herself--who pursues it with such faith that it inspires others to act to see that vision realized.