Here are some words of wisdom from a 1990 Harvard Business Review article by John P. Kotter:

• Leadership complements management; it doesn’t replace it.
• Management controls people by pushing them in the right direction; leadership motivates them by satisfying basic human needs.
• Strong leadership with weak management is no better, and sometimes actually worse, than the reverse.  The real challenge is to combine strong leadership and strong management and use each to balance the other.

I really like these motivating and inspiring quotes from the September 2011 issue of Men’s Health magazine:

The best way to predict the future is to invent it — Alan Kay

Nothing great was ever achieved without enthusiasm — Ralph Waldo Emerson

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty — Winston Churchill

I don’t know the key to success, but the key to failure is trying to please everybody — Bill Cosby

The greatest accomplishment is not in never failing, but in rising again after you fall — Vince Lombardi