There is something you should understand about the way I work.
When you need me, but do not want me, I will stay.
When you want me, but no longer need me, then I must go.
It's rather sad, really, but there it is.
Said by Nanny Mcphee in the movie Nanny Mcphee.
I just love this quote and I thought it was quite poetic, so I had to share.