It’s up to you to carve out your place, to know when to change course, and to keep yourself engaged and productive during a work life that may span some 50 years.
Peter DruckerManagement means, in the last analysis, the substitution of thought for brawn and muscle, of knowledge for folkways and superstition, and of cooperation for force. It means the substitution of responsibility for obedience to rank, and of authority of performance for the authority of rank.
Peter Drucker