When I work there are two distinct phases: the phase of pushing the work along, getting something to happen, where all the input comes from me, and phase two, where things start to combine in a way that wasn't expected or predicted by what I supplied. Once phase two begins everything is okay, because then the work starts to dictate its own terms. It starts to get an identity which demands certain future moves. But during the first phase you often find that you come to a full stop.