In most cases, those who want power probably shouldn't have it, those who enjoy it probably do so for the wrong reasons, and those who want most to hold on to it don't understand that it's only temporary.

His books have sold more than nineteen million copies[citation needed] with some on the New York Times Best Seller List. John Calvin Maxwell (born 1947) is an evangelical Christian author speaker and pastor who has written more than 60 books primarily focusing on leadership.