Theory is a dirty word in some managerial quarters. That is rather curious, because all of us, managers especially, can no more get along without theories than libraries can get along without catalogs and for the same reason: theories help us make sense of incoming information.
Henry Mintzberg (2009). “Managers Not Mbas: A Hard Look at the Soft Practice of Managing and Management Development: Easyread Large Bold Edition”, p.43, ReadHowYouWant.com