One of the most important differences between a change and a transition is that changes are driven to reach a goal, but transitions start with letting go of what no longer fits or is adequate to the life stage you are in. You need to figure out for yourself what exactly that no-longer appropriate thing is. There’s no list in the back of the book. But there is a hint can save you considerable pain and remorse: Whatever it is, it is internal. Although it might be true that you emerge from a time of transition with the clear sense that it is time for you to end a relationship or leave a job, that simply represents the change that your transition has prepared you to make. The transition itself begins with letting go of something that you have believed or assumed, some way you’ve always been or seen yourself, some outlook on the world or attitude toward others.
William Bridges, Transitions