"We can't solve problems by using the same kind of thinking we used when we created them."
- Albert Einstein
Knowledge, especially creative knowledge, is a collective thing. To understand your work, it is essential to talk about it to others. Besides important feedback on what other people enjoy and do not enjoy about your work, by explaining your work to others, you get a better picture of what you are actually doing.
Speaking to others about your work is like freewriting. You explain and find new ideas with a low filter of editing. You're just letting it out - and sometimes, you say something that is exactly what your story, poem, or article needs.
Interacting with others can put a new spin on your set ideas of what your piece was about and where it can go. Conversations can stir up something that you would never dream or imagine. Those bits of information can charge your writing with something more than yourself (yourself who, let's admit it, is limited to being itself).