For me it means not allowing our spouses words/actions/moods to dominate our feelings, or determine how we will live our life.
And yes, we do need to reach a point where we know we will be fine, even better than fine, without them.
When you read the various threads on the board, you'll get a feel for who is coping well, (overall... everyone has bad moments) even though their spouse may have rejected them or is otherwise treating them poorly. They are detached.
The one's who are struggling greatly, and allowing their spouses actions to overwhelm their life... not so much.
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl