Highlight from 'Managing Transitions' by William Bridges, Susan Bridges

It isn’t the changes that will do you in; it’s the transitions. They aren’t the same thing. Change is situational: the move to a new site, a new CEO replaces the founder, the reorganization of the roles on the team, and new technology. Transition, on the other hand, is psychological; it is a three-phase process that people go through as they internalize and come to terms with the details of the new situation that the change brings about.