“Leadership is the capacity to translate vision into reality.”
— Warren G. Bennis

“Leaders must be close enough to relate to others, but far enough ahead to motivate them.”
— John C. Maxwell

“Affirmation without discipline is the beginning of delusion.”
— Jim Rohn

“Effective leadership is putting first things first. Effective management is discipline, carrying it out.”
— Stephen Covey

“Good management is the art of making problems so interesting and their solutions so constructive that everyone wants to get to work and deal with them.”
— Paul Hawken

Source: http://www.quotestreasure.com/topics/leadership.html