In some ways it's like writing a song. I may write a song and release it, fairly content with it. A day later, 6 months later, whenever, I may suddenly realize an analogy that would have been perfect in that song, making it a much better song- and I had missed it entirely. Now at this point I have the choice of sitting down and writing another song incorporating the new view, encouraging someone else to write a new song or forgetting the whole thing. Letting it be the best I could do at that time.