Getting through your natural resistance to let go is an accomplishment. We are often at our creative best when we let go but it's so very difficult, sometimes it can only be done a little at a time. That's why you need to train, nurturing the creative side to come forth once again can be slow. Many times it can come through in a rush and that is pure fun!
The resistance can be in the conscious and the unconscious and very powerful, however make no doubt about it, they can both be conquered and then commanded to work for you.